 11 Mar 2025, Federico Rezzonico, Bug Report, python hist_get_events not returning events, but javascript does
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After starting midas (mhttpd &, and mlogger -D) and running the `fetest` frontend I went into the midas/python/examples directory and ran basic_hist_script.py,
and, even though I could see the 'pytest' program in the Programs page,
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 11 Mar 2025, Ben Smith, Bug Report, python hist_get_events not returning events, but javascript does
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> Valid events are:
> Enter event name:
>
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14 Mar 2025, Konstantin Olchanski, Bug Report, python hist_get_events not returning events, but javascript does
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> After starting midas (mhttpd &, and mlogger -D) and running the `fetest` frontend I went into the midas/python/examples directory and ran basic_hist_script.py,
and, even though I could see the 'pytest' program in the Programs page,
>
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16 Mar 2025, Federico Rezzonico, Bug Report, python hist_get_events not returning events, but javascript does
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> After starting midas (mhttpd &, and mlogger -D) and running the `fetest` frontend I went into the midas/python/examples directory and ran basic_hist_script.py,
and, even though I could see the 'pytest' program in the Programs page,
>
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19 Mar 2025, Konstantin Olchanski, Bug Report, python hist_get_events not returning events, but javascript does
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> beta version of macOS: Switching beta updates off fixed the issue.
I would be very surprised if that was the problem.
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19 Mar 2025, Konstantin Olchanski, Forum, MidasWiki special page access now restricted to logged in users
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We have a problem with over aggressive AI bots. They are scanning everything and
are putting a crazy load on the mediawiki mysql database. This makes all out
wikis very slow and unresponsive, which is a big problem.
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17 Mar 2025, Federico Rezzonico, Bug Report, python hist_get_recent_data returns no historical data
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Setup:
setting up midas, starting mhttpd and mlogger and running fetest.
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17 Mar 2025, Ben Smith, Bug Report, python hist_get_recent_data returns no historical data
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Unfortunately I again cannot reproduce this:
$ python ~/DAQ/midas_latest/python/examples/basic_hist_script.py
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18 Mar 2025, Federico Rezzonico, Bug Report, python hist_get_recent_data returns no historical data
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> Unfortunately I again cannot reproduce this:
>
> $ python ~/DAQ/midas_latest/python/examples/basic_hist_script.py
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18 Mar 2025, Konstantin Olchanski, Bug Report, python hist_get_recent_data returns no historical data
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>
> However right after running these commands I removed a .SHM_HOST.TXT file
>
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28 Feb 2025, Zaher Salman, Info, Syntax validation in sequencer 
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Hello,
I've implemented a very basic syntax validation in the sequencer GUI. Click the validation button to check the syntax in the current tab.
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05 Feb 2025, Andreas Suter, Forum, Transition from mana -> manalyzer
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Hi,
we are planning to migrate from mana to manalyzer. I started to have a look into it and realized that I have some lose ends.
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05 Feb 2025, Andrea Capra, Forum, Transition from mana -> manalyzer
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Hi Andreas,
please find in elog:2938/1 a short introduction that I wrote sometime ago.
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06 Feb 2025, Konstantin Olchanski, Forum, Transition from mana -> manalyzer
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> Could somebody please give me a boost?
no need to shout into the void, it is pretty easy to identify the author of manalyzer and ask me directly.
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06 Feb 2025, Konstantin Olchanski, Forum, Transition from mana -> manalyzer
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> > Is there a clear migration docu somewhere?
I can also give you links to the alpha-g analyzer (very complex) and the DarkLight trigger TDC analyzer (very simple),
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18 Jan 2025, Pavel Murat, Forum, mjsonrpc: how to increase the max allowed length of the callback response ?
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Dear MIDAS experts,
I'm using MIDAS javascript interface (mjsonrpc) to communicate with a frontend from a custom web page
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20 Jan 2025, Ben Smith, Forum, mjsonrpc: how to increase the max allowed length of the callback response ?
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> I'm using MIDAS javascript interface (mjsonrpc) to communicate with a frontend from a custom web page
> and observe that the if the frontend's response exceeds certain number of bytes, it is always truncated.
>
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29 Dec 2024, Pavel Murat, Forum, time ordering of run transition calls to TMFeEquipment things
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Dear MIDAS experts,
I have a question about "tmfe approach" to implementing MIDAS frontends. If I read the code correctly,
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01 Jan 2025, Konstantin Olchanski, Forum, time ordering of run transition calls to TMFeEquipment things
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> I have a question about "tmfe approach" to implementing MIDAS frontends. If I read the code correctly,
> within this approach it is the TMFeEquipment things, not the TMFrontend's themselves,
> which handle the run transitions - the TMFrontend class
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02 Jan 2025, Pavel Murat, Forum, time ordering of run transition calls to TMFeEquipment things
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Hi K.O., your clarification is much appreciated!
"
> I am not sure what you are trying to do. It is always easier to suggest a solution to a specific problem.
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05 Jan 2025, Stefan Ritt, Forum, time ordering of run transition calls to TMFeEquipment things
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Hi Pavel,
have you looked into
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17 Dec 2024, Lukas Gerritzen, Bug Report, [History plots] "Jump to current time" resets x range to 7d
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To reproduce:
- Open a history plot, click [-] a few times until the x axis shows more than 7 days.
- Scroll to the past (left)
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19 Dec 2024, Stefan Ritt, Bug Report, [History plots] "Jump to current time" resets x range to 7d
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I had put in a check which limits the range to 7d into the past if you press the "play" button, but now I'm not sure why this was needed. I removed it again
and
things seem to be fine. Change is committed to develop.
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13 Dec 2024, Marius Koeppel, Info, New Feature: Message Search
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Dear all,
a new feature was implemented which allows to search the log messages in MIDAS. Attached one can find a more detailed explanation of how to use the feature.
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18 Nov 2024, Lukas Gerritzen, Suggestion, Comma-separated indices in alarm conditions
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I have the following use case: I would like to check if two elements of an array exceed a certain threshold.
However, they are not consecutive. Currently, I have to write two alarms, one checking Array[8] and one
checking Array [10].
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10 Dec 2024, Stefan Ritt, Suggestion, Comma-separated indices in alarm conditions
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These kind of alarm conditions have been implemented and committed. The documentation at
https://daq00.triumf.ca/MidasWiki/index.php/Alarm_System
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26 Nov 2024, Nick Hastings, Bug Report, TMFE::Sleep() errors
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Hello,
I've noticed that SC FEs that use the TMFE class with midas-2022-05-c often report errors when calling TMFE:Sleep().
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26 Nov 2024, Maia Henriksson-Ward, Bug Report, TMFE::Sleep() errors
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> Hello,
>
> I've noticed that SC FEs that use the TMFE class with midas-2022-05-c often report errors when calling TMFE:Sleep().
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27 Nov 2024, Konstantin Olchanski, Bug Report, TMFE::Sleep() errors
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> [tmfe.cxx:1033:TMFE::Sleep,ERROR] select() returned -1, errno 22 (Invalid argument).
The very original copy of this function had an error and was spewing out this error quite often,
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27 Nov 2024, Konstantin Olchanski, Bug Report, TMFE::Sleep() errors
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>
> I wonder also if now that midas requires stricter/newer c++ standards if there maybe
> some more straightforward method to sleep that is sufficiently robust and portable.
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27 Nov 2024, Konstantin Olchanski, Bug Report, TMFE::Sleep() errors
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> status = select(1, &fdset, NULL, NULL, &timeout);
>
> On error, -1 is returned, ... timeout becomes undefined.
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06 Dec 2024, Konstantin Olchanski, Bug Report, TMFE::Sleep() errors
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> > status = select(1, &fdset, NULL, NULL, &timeout);
> > On error, -1 is returned, ... timeout becomes undefined.
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06 Dec 2024, Konstantin Olchanski, Bug Report, TMFE::Sleep() errors
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> Commit [develop 06735d29] improve TMFE::Sleep()
Report of test_sleep on Ubuntu-22 (Intel E-2236) and MacOS 14.6.1 (M1 MAX Mac Studio).
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06 Dec 2024, Stefan Ritt, Info, New slow control framework "mdev"
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A new slow control mini-framework has been developed for MIDAS and been successfully tested in the Mu3e experiment. It
might be suited for other experiments as well.
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23 Oct 2024, Lukas Gerritzen, Bug Report, ODB key picker does not close when creating link / Edit-on-run string box too large
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To reproduce:
In the interactive ODB, click the 🔗 icon to create a link. Next to the target, click the "..." button to open
the key picker browser. Then try to close it by either:
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02 Dec 2024, Stefan Ritt, Bug Report, ODB key picker does not close when creating link / Edit-on-run string box too large
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> Actual result:
> The key picker does not close.
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04 Dec 2024, Konstantin Olchanski, Bug Report, ODB key picker does not close when creating link / Edit-on-run string box too large
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> > Actual result:
> > The key picker does not close.
>
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02 Dec 2024, Stefan Ritt, Bug Report, ODB key picker does not close when creating link / Edit-on-run string box too large
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> Another more minor visual problem is the edit-on-start dialog. There seems to be no upper bound to the
> size of the text box. In the attached screenshot, ShortString has a maximum length of 32 characters,
> LongString has 255. Both are empty at the time of the screenshot. Maybe, the size should be limited to a
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05 Dec 2024, Konstantin Olchanski, Bug Report, ODB key picker does not close when creating link / Edit-on-run string box too large
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> > Another more minor visual problem is the edit-on-start dialog. There seems to be no upper bound to the
> > size of the text box. In the attached screenshot, ShortString has a maximum length of 32 characters,
> > LongString has 255. Both are empty at the time of the screenshot. Maybe, the size should be limited to a
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15 Aug 2024, Scott Oser, Forum, "Safe" abort of sequencer scripts
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We often use the MIDAS sequencer to temporarily control detector settings, such as:
* <change some setting>
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19 Aug 2024, Stefan Ritt, Forum, "Safe" abort of sequencer scripts
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This request came more than once in the past. One thing I could implement is a "atexit" function similarly to the C funciton atexit().
Then we would have a function in the script which gets called whenever one does "stop immediately". This function can then restore
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22 Aug 2024, Scott Oser, Forum, "Safe" abort of sequencer scripts
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> This request came more than once in the past. One thing I could implement is a "atexit" function similarly to the C funciton atexit().
>
> Then we would have a function in the script which gets called whenever one does "stop immediately". This function can then restore
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02 Dec 2024, Stefan Ritt, Forum, "Safe" abort of sequencer scripts
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The atexit() function has been implemented in the current develop branch of midas, see
https://daq00.triumf.ca/MidasWiki/index.php/Sequencer#ATEXIT_subroutine
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11 Sep 2024, Konstantin Olchanski, Forum, "Safe" abort of sequencer scripts
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> We often use the MIDAS sequencer to temporarily control detector settings, such as:
>
> * <change some setting>
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30 Nov 2024, Pavel Murat, Bug Report, EQ_PERIODIC-only equipment ?
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Dear Midas experts,
I'm running into something which looks like an initialization problem.
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01 Dec 2024, Stefan Ritt, Bug Report, EQ_PERIODIC-only equipment ?
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There is no requirement that you pair an EQ_PERIODIC with an EQ_TRIGGER. Take for exmaple
midas/examples/experiment/frontend.cxx
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01 Dec 2024, Pavel Murat, Bug Report, EQ_PERIODIC-only equipment ?
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> There is no requirement that you pair an EQ_PERIODIC with an EQ_TRIGGER. Take for exmaple
>
> midas/examples/experiment/frontend.cxx
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07 Oct 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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We're trying to install the SuperCDMS version of MIDAS on a Rocky 9.4 Virtual
Machine and are getting a persistent error when we run mserver. As far as I
know there are minimal changes between this and the MIDAS branch, but Ben Smith
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07 Oct 2024, Ben Smith, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> We're trying to install the SuperCDMS version of MIDAS on a Rocky 9.4 Virtual
> Machine and are getting a persistent error when we run mserver. As far as I
> know there are minimal changes between this and the MIDAS branch, but Ben Smith
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08 Oct 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> > We're trying to install the SuperCDMS version of MIDAS on a Rocky 9.4 Virtual
> > Machine and are getting a persistent error when we run mserver. As far as I
> > know there are minimal changes between this and the MIDAS branch, but Ben Smith
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08 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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I read these error messages. There is no ODB corruption. ODB semaphore is locked and all midas programs will fail, they will timeout trying to get the lock,
report the timeout, then it looks like a bug was introduced where instead of hard exit or abort() they attempt a clean shutdown which crashes from a recursive
call in db_lock_database(). Amy's
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08 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> I read these error messages. There is no ODB corruption. ODB semaphore is locked and all midas programs will fail...
Recovery from this is:
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07 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> We're trying to install the SuperCDMS version of MIDAS on a Rocky 9.4 Virtual
> Machine and are getting a persistent error when we run mserver.
>
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08 Oct 2024, Mark Grimes, Bug Report, Difficulty running MIDAS on Rocky 9.4
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We run Midas with no problems on Rocky 9.4, although not in a virtual machine. We're very close to the head of `develop`.
I'm fairly sure I've seen an error like this before. I didn't pay it much attention because it was transitory and I was doing something weird at the time |
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08 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> Basically I think Rocky 9.4 is a red herring.
This is what likely happened:
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08 Oct 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> > We're trying to install the SuperCDMS version of MIDAS on a Rocky 9.4 Virtual
> > Machine and are getting a persistent error when we run mserver.
> >
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08 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> I've uploaded the current core dump at: https://gitlab.com/det-lab/coredumps#.
I cannot read the core dump without the corresponding executable (and likely all it's shared libraries).
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10 Oct 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> > I've uploaded the current core dump at: https://gitlab.com/det-lab/coredumps#.
>
> I cannot read the core dump without the corresponding executable (and likely all it's shared libraries).
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13 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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Thank you for the stack trace, I fixed the buglet that cause midas programs to crash twice,
once on failure to lock ODB, then call exit() -> atexit() handlers -> cm_check_connect() -> crash on ODB lock
failure is the cm_msg() codes.
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16 Oct 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> Thank you for the stack trace, I fixed the buglet that cause midas programs to crash twice,
> once on failure to lock ODB, then call exit() -> atexit() handlers -> cm_check_connect() -> crash on ODB lock
> failure is the cm_msg() codes.
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18 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> [aroberts@sdfcdmsdaq midas]$ odbedit
> [ODBEdit,ERROR] [odb.cxx:2043:db_open_database,ERROR] Removed ODB client 'ODBEdit', index 0 because process pid
> 1615051 does not exists
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18 Oct 2024, Konstantin Olchanski, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> suddenly, an ODB semaphore timeout...
I am wondering if something bizarre is going on, like the system clock going backwards. I heard of things like that
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28 Oct 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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> Now for each timeout it will print detailed syscall and timing information, if time goes backwards, it should catch it.
It appears that time is moving forward:
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06 Nov 2024, Amy Roberts, Bug Report, Difficulty running MIDAS on Rocky 9.4
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After following Konstantin's debugging suggestions, I thought I would try to replicate
the issue on my own computer. My hope was that I could provide instructions for
replicating the bug so that the MIDAS team could try debugging things more easily.
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22 Nov 2024, Konstantin Olchanski, Bug Report, ODB lock timeout, Difficulty running MIDAS on Rocky 9.4
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> try to replicate the issue ...
I see ODB lock timeout (and abort() of everything) in the dsvslice test station. We have
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24 Nov 2024, Pavel Murat, Bug Report, ODB lock timeout, Difficulty running MIDAS on Rocky 9.4
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there is a really good software tool developed by the Fermilab DAQ group, called TRACE -
https://github.com/art-daq/trace ,
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21 Nov 2024, Mann Gandhi, Info, What do the status numbers mean and where can I find more information about them?
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Hello,
This is the error message I got:
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21 Nov 2024, Stefan Ritt, Info, What do the status numbers mean and where can I find more information about them?
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> [RP Streaming Frontend,ERROR] [midas.cxx:17806:cm_write_event_to_odb,ERROR]
> cannot create key for bank "DATA" with tid 24 in ODB, db_create_key() status 309
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13 Nov 2024, Stefan Ritt, Info, New sequencer command ODBLOOKUP
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A new sequencer command "ODBLOOKUP" has been implemented, which does a lookup of a string in a string
array in the ODB given by a path and returns its index as a number. If we have for example an array
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15 Nov 2024, Konstantin Olchanski, Info, New sequencer command ODBLOOKUP
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> A new sequencer command "ODBLOOKUP" has been implemented, which does a lookup of a string in a string
> array in the ODB given by a path and returns its index as a number. If we have for example an array
>
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18 Nov 2024, Stefan Ritt, Info, New sequencer command ODBLOOKUP
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> "value not found" sets "index" to ?
It sets it actually to "not found". Since all variables are stings in the sequencer, you can then do a test like
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14 Nov 2024, Mann Gandhi, Suggestion, Issue with creating banks
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Hello, I am a coop student working at SNOLAB. I am currently setting up a frontend
program to collect data for an experiment I am currently having with my bank being
initialized correctly with the correct name. I will attach an image of the error and
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14 Nov 2024, Stefan Ritt, Suggestion, Issue with creating banks
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All I can see is that your bank header gets corrupted along the way. The funny character reported by
cm_write_event_to_odb indicates that your original name "RPD0" got overwritten somewhere, but I could not spot any
mistake in your code.
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14 Nov 2024, Mann Gandhi, Suggestion, Issue with creating banks
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> All I can see is that your bank header gets corrupted along the way. The funny character reported by
> cm_write_event_to_odb indicates that your original name "RPD0" got overwritten somewhere, but I could not spot any
> mistake in your code.
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15 Nov 2024, Konstantin Olchanski, Suggestion, Issue with creating banks
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> Hello, I am a coop student working at SNOLAB.
> void* data_acquisition_thread(void* param)
> {
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07 Nov 2024, Lukas Gerritzen, Suggestion, Stop run and sequencer button
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Due to popular demand among our students, I added a button to the sequencer that stops the run and the sequence. If you find it useful, please consider
merging this upstream.
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07 Nov 2024, Stefan Ritt, Suggestion, Stop run and sequencer button
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I don't find this very useful. Some experiments do not only want to stop the run, but also do other cleanup things. To do that, I proposed and "atexit"
function like C has it. Then the user can put a run stop there, plus any other cleanup. This will be much more flexible. Think about the "reset" script
we have to manually run if we abort a sequencer. The atexit function will come next week, so you should consider to use it instead your additional button.
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