system.tag.writeBlocking() not handled by try/except block

[PGriffith]

For complicated reasons, Jython exceptions are distinct from Java exceptions, and so you need to catch both, separately:

Catch IOException?

Consider using two except blocks, as jython’s standard Exception won’t catch pure java exceptions. Like so: import java.lang.Exception try: # something something something except Exception, e: # jython exception except java.lang.Exception, e: # java exception