softIocPVA hangs when setting up multicast fails

[dirk-zimoch]

I see this error when running an EPICS 7.0.8 softIocPVA compiled for Windows on RHEL9 using wine (that's how I usually test code for Windows):

Starting iocInit
############################################################################
## EPICS R7.0.8.1-DEV-2024-06-13
## Rev. PSI-7.0.8.1-0-0-g54117d537
## Rev. Date Git: 2024-06-12 15:37:41 +0200
############################################################################
Error initializing pva link handling : Failed to set multicast network interface
'127.0.0.1': Invalid argument.
Thread win24 (0000000000F72BC0) can't proceed, suspending.
Dumping a stack trace of thread 'win24':

Stack dump follows, then the ioc hangs.

Is it really necessary to die with an uncaught runtime_error exception when setMutlicastNIF() fails? What about just setting up UDP and ignoring multicast in this case?

BTW: This problem does not appear when running the native RHEL9 compilation on RHEL9 or when running the Windows version in wine on RHEL8, where we use a different wine version. But my specific setup here is not the point.