Experimental Physics and
Industrial Control System

"Koennecke Mark \(PSI\) via Tech-talk" <tech-talk at aps.anl.gov> · Thu, 22 Jul 2021 11:17:28 +0000

Hi,

I have encountered a problem with pyepics, the most recent version on rhel7. 

The trouble is: I have many PV on a local IOC, but also want to access another PV reachable 
via a gateway on port 5062. 

I set an appropriate EPICS_CA_ADDR_LIST like: export EPICS_CA_ADDR_LIST="hipa-cagw:5062:localhost“,
and this works to my satisfaction with the standard caget from EPICS base. 

If I start python from the same terminal == same environment, load pyepics, and try to use
caget() I cannot access any PV’s at all. I have not found any reference to EPICS_CA_ADDR_LIST in the
pyepics docs. Is this a limitation or a bug? Or am I missing something?

We eventually worked around the problem by installing a calc record pointing to the PV accessible through 
the gateway in our IOC and this works.   

Best Regards,

    Mark Koennecke

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System