Experimental Physics and
Industrial Control System

Hello all –

 

I am trying to set up something to do some automated testing of communication with a running IOC with PyEpics, but unfortunately I am running into some inconsistent behavior which makes it difficult to use as a reliable testing mechanism.

 

Specifically, if I have an IOC (EPICS base 7.0.3.1) up and running on the same machine, and run the following script:

 

from epics import PV

pv = PV(“test”)

assert pv.connect()

 

then most of the time, this works exactly as intended. However, somewhere around 1 in 5 times or so, it fails. I have tried to look at the network traffic (using Wireshark) between the IOC and the python client, but unfortunately I don’t see a difference between successful and unsuccessful connection attempts.

 

I am running both IOC and client inside a linux VM on my mac.

 

Any help would be appreciated,

 

Cheers,

 

Simon