can only do one mate at a time, something has changed I was able to do all 3 at one time. Any Ideas?
Were you using Mate References?
This might be a helpful post: How Many Mates Can Be Created At Once in SolidWorks? One, Two,… Three?
make sure this option is not checked:
You are not able to create more than one mate at a time because Mate PropertyManager is closed after press OK? If yes, please make sure push pin is checked:
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