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Addition to my other comment: Aspen has confirmed that HYSYS v8.0 / v8.1 / v8.2 have a bug that causes this behaviour. Should work well on v7.3.
About v8.3: don't know.
I'm running Hysys v8.0 and I try to use the PlayScript function, but Hysys becomes non-responsive and crashes.
Anybody else have this issue with this file (and other scripts, for that matter)?
Works exactly like it's supposed to!