Issue with modifying collections for 1 library

@NintendoFanBoyFTW

Thank you for the link in the other thread.

Windows is not my forte (I don’t have a Windows VM)

From the excerpt you posted above, there isn’t enough detail to see what’s failing.
“Bad lexical cast” itself is meaningless but does point to some other problem.

Please enable DEBUG logging and recreate then download & attach the ZIP logs.
DEBUG logging will let me see what it doesn’t like.