I just attempted the same sequence using a known valid network path on IRIS 2025.1.1 and it worked as expected. The result set contained the list of folders and files in the specified share.

I've never created an IPM module ... it seems like a fair amount of effort to set it up for a single small class and based  on my current status it's unlikely that I'd do it more than this one time.

That said, if some streamlined mechanism for building and publishing it exists, I'll give it a shot ...

ORCgrp is a member of PIDgrpgrp and PIDgrpgrp is missing from your "if" statement. The condition should read:

..Contains(..ToUpper(source.{PIDgrpgrp(k1).ORCgrp(k2).OBXgrp(k3).OBX:ObservationValue()}),"DETECTED")

I don't know whether you're using the same doctype for the target, but if you are, the target path will need to be updated as well.