After making some timing constraint changes in Constraints Editor, I launch Floorplan Editor to make some physical constraint changes, NGDBuild runs and Floorplan Editor is launched. One of the following will occur:
+ Project Navigator crashes
+ After clicking yes to "reload or exit" dialog, Constraints Editor and Floorplan Editor close, but only Floorplan Editor is relaunched
+ ERROR:ConstraintSystem:151 - Unable to alter the constraint manager because the shared constraint database has been closed.
+ The constraints in the Constraints Editor tables are cleared
To work around this, manually change the UCF for timing and physical constraints.
This issue will be resolved in a future release of the software.