 28 Apr 2023, Konstantin Olchanski, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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> As i said we can easily reproduce this with midas/examples/odbxx/odbxx_test.cpp (with cm_connect_experiment changed to "localhost")
> [test,ERROR] [system.cxx:5104:recv_tcp2,ERROR] unexpected connection closure
> [test,ERROR] [system.cxx:5158:ss_recv_net_command,ERROR] error receiving network command header, see messages
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28 Apr 2023, Martin Mueller, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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> > As i said we can easily reproduce this with midas/examples/odbxx/odbxx_test.cpp (with cm_connect_experiment changed to "localhost")
> > [test,ERROR] [system.cxx:5104:recv_tcp2,ERROR] unexpected connection closure
> > [test,ERROR] [system.cxx:5158:ss_recv_net_command,ERROR] error receiving network command header, see messages
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28 Apr 2023, Konstantin Olchanski, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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> > > As i said we can easily reproduce this with midas/examples/odbxx/odbxx_test.cpp
> > ok, cool. looks like we crashed the mserver.
> Ok. Maybe i have to make this more clear. ANY odbxx access of a remote odb reproduces this error for us on multiple machines.
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02 May 2023, Niklaus Berger, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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Thanks for all the helpful hints. When finally managing to evade all timeouts and attach the debugger in just the right moment, we find that we get a segfault
in mserver at L827:
case RPC_DB_COPY_XML:
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02 May 2023, Niklaus Berger, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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And now we also fixed the client segfault, odb.cxx L8992 also needs to know about the header:
if (rpc_is_remote())
return rpc_call(RPC_DB_COPY_XML, hDB, hKey, buffer, buffer_size, header);
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02 May 2023, Stefan Ritt, Forum, Problem with running midas odbxx frontends on a remote machine using the -h option
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> Shall I create a pull request for the additional RPC argument or will you just fix this on the fly?
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 08 Jul 2021, Francesco Renga, Forum, Problem with python file reader
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Dear experts,
while trying to readout a MIDAS file from a python script. I get the error below at the very first event. Any hint?
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09 Jul 2021, Ben Smith, Forum, Problem with python file reader
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Hi Francesco,
Can you send me an example file to look at please? Either attached to the elog or sent directly to bsmith@triumf.ca
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26 Apr 2017, Francesco Renga, Forum, Problem with logger at run start
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Dear experts,
we have a problem when trying to run a MIDAS DAQ which worked in the past on the same PC (but on a different
network). We get the following error messages when starting a new run:
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26 Apr 2017, Stefan Ritt, Forum, Problem with logger at run start
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Dear Francesco,
Your error (No route to host) typically means that you have a network problem outside of MIDAS. Your computer has to "find itself" and
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26 Apr 2017, Francesco Renga, Forum, Problem with logger at run start
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Dear Stefan,
thank you very much for your reply. We could finally fix the problem by replacing "scarlett" with "scarlett.localdomain" in our
hostname configuration file /etc/hostname (under debian).
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02 May 2017, Konstantin Olchanski, Forum, Problem with logger at run start
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> Wed Apr 26 23:03:12 2017 [mhttpd,ERROR] [midas.c:9106:rpc_client_connect,ERROR] cannot connect to host "scar
> lett", port 44858: connect() returned -1, errno 113 (No route to host)
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14 Oct 2014, Konstantin Olchanski, Bug Report, Problem with EQ_USER
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If you use EQ_USER in mfe.c and have multiple threads writing into the ring buffer, you will have a big
problem - the thread locking in the ring buffer code only works for a single writer thread and a single
reader thread.
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15 Oct 2014, Stefan Ritt, Bug Report, Problem with EQ_USER
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Sure, each thread needs its own ring buffer for writing.
So I see that we need back the multiple-ring-buffer-readout-scheme even before MEG will start. So what you need is something like
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16 Oct 2014, Stefan Ritt, Bug Report, Problem with EQ_USER
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I restructured the front-end code to enable multiple readout threads for EQ_USER equipment. Last summer I was definitively interrupted during
that work and left it in an half finished state, sorry for that.
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10 Aug 2012, Carl Blaksley, Forum, Problem with CAMAC controlled by CES8210 and read out by CAEN V1718 VME controller
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Hello all,
I am trying to put together a system to read out several camac adc. The camac is
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22 Feb 2016, ZiyiGuo, Forum, Problem with BLTRead
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Dear all,
I'm using MIDAS system and CAEN V1721 to digitize the waveform from photomultipliers (
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23 Feb 2016, Pierre-Andre Amaudruz, Forum, Problem with BLTRead
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> Dear all,
>
> I'm using MIDAS system and CAEN V1721 to digitize the waveform from photomultipliers (
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02 Mar 2016, ZiyiGuo, Forum, Problem with BLTRead
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> > Dear all,
> >
> > I'm using MIDAS system and CAEN V1721 to digitize the waveform from photomultipliers (
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26 Jun 2019, Hassan, Forum, Problem transferring fetest data from the remote frontend to the backend
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Hi again, we now have Midas installed on the Rpi (remote frontend machine) and
have managed to run Fetest on it. Now we are at a stage where we want to send
the Fetest data over to the Data Acquisition machine, which also has Midas
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