 14 Jan 2026, Stefan Ritt, Bug Report, DEBUG messages not showing and related
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MT_DEBUG messages are there for debugging, not logging. They only go into the SYSMSG buffer and NOT to the log file. If you want anything logged, just use
MT_INFO.
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 20 Jan 2026, Stefan Ritt, Info, New tabbed custom pages 
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Tabbed custom pages have been implemented in MIDAS. Below you see and example. The documentation
is here:
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23 Jan 2026, Stefan Ritt, Info, Homebrew support for midas
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Hi Mathieu,
thanks for your contribution. Have you looked at the install.sh script I developed last week:
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26 Jan 2026, Stefan Ritt, Info, Homebrew support for midas
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> Actually, these two approaches are slightly different I guess:
> - the installation script you are linking manages the
> installation and the subsequent steps, but doesn't manage the dependencies: for instance on my machine, it didn't find root and so manalyzer
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06 Feb 2026, Stefan Ritt, Bug Report, omnibus bugs from running DarkLight
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Thanks for the detailed report. Let me reply one-by-one.
> 1) history plots on 12 hrs, 24 hrs tend to hang with "page not responsive". most plots have 16-20 variables,
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06 Feb 2026, Stefan Ritt, Bug Report, omnibus bugs from running DarkLight
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> 3) ODB editor clicking on hex number versus decimal number no longer allows editing in hex, Stefan implemented
> this useful feature and it worked for a while, but now seems broken.
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06 Feb 2026, Stefan Ritt, Bug Report, omnibus bugs from running DarkLight
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> 4) ODB editor "right click" to "delete" or "rename" key does not work, the right-click menu disappears
> immediately before I can use it (dl-server-2), click on item (it is now blue), right-click menu disappears
> before I can use it (daq17). it looks like a timing or race condition.
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06 Feb 2026, Stefan Ritt, Bug Report, omnibus bugs from running DarkLight
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> 5) ODB editor "create link" link target name is limited to 32 bytes, links cannot be created (dl-server-2), ok
> on daq17 with current MIDAS.
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12 Feb 2026, Stefan Ritt, Bug Report, omnibus bugs from running DarkLight
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Now I had a similar case that the browser froze when showing 24h of data. Tuned out that 80k points are a bit much. I changed the code so that it starts
binning when showing 8h or more. This is not a perfect solution. The code should check at which interval data is written, then
automatically start binning when approaching 4000 points or more. That would however require more complicated code, so I leave it as it is right now. Feedback |
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27 Apr 2026, Stefan Ritt, Bug Report, increasing the max number of hot links in ODB
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I wonder why one needs more than 256 hotlinks at all. Please note that with the odbxx "watch" API, you can hotline a whole subdirectory, and get notified
if ANY of the
underlying values or subdirectories change. In principle, one could have one hotlink to "/" and see all changes in the ODB (although that does not make |
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29 May 2026, Stefan Ritt, Info, ODBvalue timeout
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> Dear all, I implemented an optional timeout for the wait ODBvalue command. The way it works is similar to the standard wait command:
>
> WAIT ODBvalue, /Equipment/HV/Variables/Measured[3], <, 100, timeout, 60
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29 May 2026, Stefan Ritt, Info, ODBvalue timeout
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> >
> > How can the MSL code figure out if the wait succeeded or timed out?
> >
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29 May 2026, Stefan Ritt, Info, ODBvalue timeout
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> > > >
> > > > How can the MSL code figure out if the wait succeeded or timed out?
> > > >
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09 Jun 2026, Stefan Ritt, Bug Report, incompatible ODB XML dumps
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I fixed that by not requiring the handle explicitly:
if (mxml_get_attribute(node, "handle") != nullptr)
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11 Jun 2026, Stefan Ritt, Suggestion, Multithreaded deferred transitions
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Multithreaded transitions were introduced by KO in 2019. Please ask him to make deferred transitions work
again or simply use non-multithreaded transitions.
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14 Aug 2026, Stefan Ritt, Info, mplot.js: viridis colour scheme for 2D plots
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Here is an example how a 2D plot looks like.
Stefan |
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07 Sep 2026, Stefan Ritt, Info, ODB Browser Update
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A major update of the ODB Browser has been made in the last few days. Here are the new features:
The browser supports now multiple tabs. You can open as many tabs as you like, and they stay persistent even if you
navigate away and come back to the ODB page (unless you close the browser). This allows easily swiching between different subdirectories in the ODB.
A |
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19 Nov 2025, Stefan Mathis, Forum, Control external process from inside MIDAS
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Dear all,
I want to control (start / stop / monitor its stdout and stderr) an external process (systemd / EPICS IOC shell script) from within MIDAS.
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20 Nov 2025, Stefan Mathis, Forum, Control external process from inside MIDAS
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Thanks a lot,
Nick. Regarding the messages: Zaher showed me that it is possible to simply place a custom log file generated by the systemd next to midas.log - then it |
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21 Nov 2025, Stefan Mathis, Forum, Control external process from inside MIDAS
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Hi,
unfortunately I don't have a documentation link to the feature, I just know that it works on my machine ;-) The general idea is that you place a custom |