描述

When I create a TPTHRU group constraint with a FROM:TO constraint, and then try to disable or delete the TPTHRU group or the FROM:TO constraint, the Constraints Editor does not allow the modification. How do I make these changes?

解决方案

To work around this problem, manually modify the constraint in the UCF file.  

This issue is fixed in the 11.1 release of the software.