genie_python Troubleshooting - ISISComputingGroup/ibex_developers_manual GitHub Wiki
Genie_python writes its logs to ...\Instrument\var\logs\genie_python.
The following is written to the log when a virtual circuit disconnects from the IOC side:
2018-05-21T15:21:31 (CA) (15712) ERROR: CAException: type=-1 state=192 op=5 file=..\cac.cpp lineNo=1223
2018-05-21T15:21:31 (CA) (15712) ERROR: CAException: type=6 state=192 op=0 file=..\getCopy.cpp lineNo=92
The time stamp on these are for the first get_pv call or equivalent after a disconnect.
There can be multiple problems, check:
- Block exists
- Block is spelt correctly, use
b.and autocomplete - Try getting the underlying PV
g.get_pv("IN:<instrument>:CS:SB:<Block name?") - Restart the GUI genie_python console
Have you pulled and rebuilt the latest version of the repository under \Apps\Python3 ?
If genie_python crashes on start with a windows error but the underlying Python appears to start ok try importing numpy. We have a problem with the latest CPUs (skylakex) running under the hypervisor which means that the OPENBLAS library has an unknown instruction in it. The current fix is to set the environment variable so it appears it is running a different core type. Do this with:
OPENBLAS_CORETYPE=Haswell
This is set within the system environment on the PC; currently, this fix is only needed on RIKENFE and MUONFE.
If you get an error message similar to
*** Cannot find GENIE-PYTHON 3 - some things are not likely to work ***
on running config_env.bat, you need to ensure you have Python 3 available on your system.
When running dev_build_python.bat, you may get an error when Windows tries to apply a patch to the CaChannel.py file. E.g.
can't find file to patch at input line XXX
Perhaps you should have used the -p or --strip option?
This seems to be caused by using patch from strawberry perl patch and not from git.
If this happens, comment out the patch command in common_build_python.bat, then run the script again. Once it's finished, open a Git Bash window, cd to /c/Instrument/Apps/Python3/package_builder and run the same patch command you commented out, changing the Windows paths to UNIX paths (\ -> / and C: -> /c). Then, check the CaChannel.py file to ensure it was patched properly.
Users seems not to get set properly using g.change_users, see ticket 5812. Look into this it is more than a one off.
If you get repeated errors of the form:
2020-11-11T17:20:48 (CMD) (17808) 2020-11-11 17:20:48.374781: Exception in waitfor loop: UnableToConnectToPVException: Unable to connect to PV IN:LARMOR:DAE:GOODUAH: does not exist
2020-11-11T17:20:48 (CMD) (17808) 2020-11-11 17:20:48.512496: Exception cleared
You may need to restart the genie_python session. The root cause of this issue is currently unknown. See ticket 5893 for details, including a script which can scan all instruments for occurrences of this issue. If this issue is seen again, please create a new ticket to investigate further and also link it here.
In one case this was due to the firewall rule for A:\python3\python.exe had been disabled - a process firewall exception is needed to allow it to receive the UDP name query reply