If you have iteration 4 with 6 instances, and you check in iteration 5 with an empty table, you have to delete from top to bottom all, where used dependencies, from the first to iteration 4. Without deleting where used drawings and assemblies in Windchill, you can‘t purge the model and get rid of the unused old instances of the generic model.
Personally I‘m no longer a fan of keeping old iterations in the database. It’s a waste of time and cpu. Just work with the latest iterations is enough in 99.9% of all cases. Form, Fit and Function is important. Working with tons of unused iterations will slow down Windchil in the long run. Just think about the attribute search, you don‘t care about old values, but you waste cpu by excluding them on each search.
I would no longer configure Windchill in that way, but this may a different discussion 😉
Keep each released iteration is enough, but not any working iteration.
