Just a tip (you may already know anyway): try to use the option “Dump Library Parts of Selected Elem” of the “Library Developer Menu” to list the stored and active parameter values into the Report window – but these do not apply themselves onto the opened libpart in GDL editor, so maybe not so much of a help, but at least the parameter values of the instance can be checked more easily. By comparing the active parameter set of 2 different instances, sometimes the source of the problem becomes clear pretty fast.
Dominika Bobály
Product Manager
GRAPHISOFT SE