Pattern is not valid

One or more of the following conditions exist which causes a pattern to be considered invalid:

• There are fewer than two pattern members
• One or more of the pattern member features are invalid
• Not all members of the pattern are the same type of feature of size
• Not all members have matching sizes
• Not all size dimensions are defined for one of the pattern members
• Not all pattern members have the same reference feature

Edits to the model can cause a pattern to become invalid. To resolve the issue, try editing the pattern and remove the member that is causing the pattern to be invalid. Sometimes it is necessary to delete the pattern and then recreate it by selecting a valid collection of features of size.