the attachment in the original post have been updated with a bugfix:
short story:
In some scenarios, the cleanup of temporary $C_ variables failed.
long story:
the CuePart object has a series of showfile specific properties
(PresetType-timing)
the name of these properties are dynamically created based on preset-type naming in attribute-setup, and the names of these presettime properties are not accessible via the property.name function, so the script failed when trying to generate C_name for an unamed property.