 10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> > Dear all
> >
> > We just started our beam time at ILL and just found yesterday that for certain
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> Then I'm running out of ideas. Things I would check:
>
> - Are the file sizes about the same?
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> with "dump" I meant a true object dump like "hexdump -C run000001.mid". I produced a file with ADC0 and TDC0
> banks (that's the example from the distribution under exampels/experiments/frontend.cxx), and I get
>
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10 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> Have you tried longer files? Maybe a few 100 MB or so. Maybe a buffer is not flushed correctly at the end of a run.
Yes, I did. This 7 KB of the data bank is about the limit. If we go only 1 KB higher it seems that we save all data. In
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11 Aug 2020, Ivo Schulthess, Bug Report, data missing in runXXXXXX.mid
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> It would be good to pin point there the data is lost. This is the sequence:
>
> frontend user code -> mfe.c code -> SYSTEM buffer -> mlogger -> disk
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23 Mar 2022, Ivo Schulthess, Bug Fix, fix for event buffer corruption in bm_flush_cache()
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Thanks for the investigation. Back in 2020, we had some issues of losing data between the system buffer and the logger writing them to disk (https://daq00.triumf.ca/elog-midas/Midas/1966).
This was polled equipment but we had a multithreaded FE running at the same time. Could this be related to the same problem?
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 13 Nov 2023, Ivo Schulthess, Forum, mlogger does not HAVE_ROOT
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Good evening,
I am setting up Midas (v2.1) for a new experiment. We want to save the data in the ROOT format. We installed ROOT from source (v6.28/06), and ROOTSYS is |
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14 Nov 2023, Ivo Schulthess, Forum, mlogger does not HAVE_ROOT
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> Stefan is right. I forgot this. As solution to our troubles, mlogger is built without root support. use rmlogger instead.
>
> K.O.
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15 Nov 2023, Ivo Schulthess, Forum, mlogger does not HAVE_ROOT
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> No, I'm not aware of this problem, but I suspect that your events somehow got corrupted. You can try the mdump utility
> or the "Event Dump" web page to peek into your events, maybe you see an issue there. To give you more detailed information,
> I would have to reproduce your problem, which is probably hard without your hardware.
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21 Nov 2023, Ivo Schulthess, Forum, Polled frontend writes data to ODB without RO_ODB
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Good morning,
In our setup, we have a neutron detector that creates up to 16 MB of polled (EQ_POLLED) data in one event (event limit = 1) that we do not want to have |
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19 Jun 2020, Isaac Labrie-Boulay, Info, Building/running a Frontend Task
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To build a frontend task, the user code and system code are compiled and linked
together with the required libraries, by running a Makefile (e.g.
../midas/examples/experiment/Makefile in the MIDAS package).
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09 Jun 2020, Isaac Labrie Boulay, Info, Preparing the VME hardware - VME address jumpers. 
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Hey folks,
I'm currently working on setting up a MIDAS experiment and I am following the
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12 Jun 2020, Isaac Labrie Boulay, Info, Preparing the VME hardware - VME address jumpers.
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> Hi, if you are not using any VME hardware, then you have no VME address jumpers to
> set. https://en.wikipedia.org/wiki/VMEbus
>
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15 Jun 2020, Isaac Labrie Boulay, Bug Report, Killing and ODB - Removed ODB client because process pid does not exists
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Hey everyone,
When I run mhttpd I get the following error message:
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05 Nov 2020, Isaac Labrie Boulay, Forum, Building an experiment using CAEN VME interface - unknown type name 'VARIANT_BOOL'
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Hi everyone,
I have been building an experiment using the v1718 CAEN interface to talk to my modules and I am using the CAENVMElib Linux Library (2.50). I've managed |
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06 Nov 2020, Isaac Labrie Boulay, Forum, Building an experiment using CAEN VME interface - unknown type name 'VARIANT_BOOL'
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06 Nov 2020, Isaac Labrie Boulay, Forum, Building an experiment using CAEN VME interface - unknown type name 'VARIANT_BOOL'
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Yes, you are right. That fixed it and my frontend is compiling.
Thanks Pierre-Andre.
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24 Nov 2020, Isaac Labrie Boulay, Forum, Invalid name "Analyzer/Tests"
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Hi everyone,
I've recently took the analyzer template from $MIDASSYS/examples/experiment and
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07 Dec 2020, Isaac Labrie Boulay, Forum, Invalid name "Analyzer/Tests"
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> https://bitbucket.org/tmidas/midas/issues/298/invalid-odb-names-in-example-midas
> K.O.
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16 Dec 2020, Isaac Labrie Boulay, Forum, Issues building banks.
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Hi all,
I'm currently trying to build events through doing block transfers. The worry was
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