Community Tip - Did you get called away in the middle of writing a post? Don't worry you can find your unfinished post later in the Drafts section of your profile page. X
Simplest example - start new manufacturing ASM, select user-defined work center, go to edit machine, select tool menu, select tool, change something in the view of tool, say shank diameter, hit apply, Message "cannot dsipaly tool for current tool setup"
So how can I modify existing tools?