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Ok, fixed that and committed changes to the repository. (renamed functions, as the names are used several times as popen, and only once as openp)
I've also reformatted the code to be more in line with the rest of PRS+, I hope it's not a problem.
PS
Oh, only now I read the updated post.
Yes, possible, but sad that one has to write special code for the test environment.
So somehow x,y aren't related to the parent group, eh? =/
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