Model-Based Definition > Geometric Dimensioning and Tolerancing Advisor > Advisor Message Help > Feature Messages > Pattern Is Invalid
Pattern Is Invalid
A pattern is considered invalid if any of the following conditions are met:
There are fewer than 2 pattern members.
One or more of the pattern member features are invalid.
Not all of the members of the pattern are the same type of feature of size.
Not all of the members have matching sizes.
Not all of the size dimensions are defined for one of the pattern members.
Not all pattern members have the same reference feature.
Changes to the CAD model may cause a pattern to become invalid. In order to fix the problem, you may be able to edit the pattern and remove the member that is causing the pattern to be invalid. In some cases, it may be necessary to delete the invalid pattern and then recreate it by selecting a valid collection of features of size.