I've managed to get CopyApp() working but only if I provide the long ID of a sheet in the array of qIDs in the parameter.
I've found the long ID in the QMC (App objects -> make the ID column visible). But how do I retrieve this info via the .NET SDK?
I suppose the long ID isn't the same as the short IDs that I can easily retrieve by calling GetAllAppInfo(). If I use those IDs I get a "9003 resource not found" exception.
I've tried App.GetSheetList() which returns a SheetList-object. It has a property called Info containing Id but when outputting the string, I mostly get the word StringList out.