Please upload such a file, so I can investigate.
It is correct that at some parts the category entry has to be set!
For example:
s\6377s01.dat
part description is: ~Duplo Train Track Straight Short (Half)
~ will be ignored
Duplo is not in the category list. Therefore a category is required!
It is correct that at some parts the category entry has to be set!
For example:
s\6377s01.dat
part description is: ~Duplo Train Track Straight Short (Half)
~ will be ignored
Duplo is not in the category list. Therefore a category is required!