maeGroupAsParametricSet has no ?session argument

I have a SKILL script running inside a form which at one point needs to create a parametric set for the Design Variables of a particular Test. I'm using maeGroupAsParametricSet for this, and it's worked well so far. Unfortunately I've just run into a problem: if I have multiple maestro windows open, maeGroupAsParametricSet starts to misbehave. Unlike other mae functions, it can't be provided a ?session argument. So if I run my form from the second maestro view that I've opened, it will fail to find the Test I specify, because it's looking for it in the first maestro view. I tested this with maeGetTestSession: if I don't provide the ?session argument, it returns nil, whereas if I do provide it, it runs successfully. This suggests to me that maeGroupAsParametricSet is looking in the first view by "default", and lacking a ?session argument it can't be told to look elsewhere. Am I misunderstanding something here, or is there a workaround for this?

The warning message that appears after calling maeGroupAsParametricSet reads as follows: 

WARNING (ASSEMBLER-1602): Cannot find test <TESTNAME> in the setup database. The test name passed to this function does not exist in the setup database. Perhaps the name was misspelled or has not yet been created. The test needs to be created before calling this function.

I'm on version IC23.1-64b