When I try to open the Synthesized Design or run implementation, PlanAhead tool exits unexpectedly and the resultant terminal contains the following error:
Input buffer overflow, can't enlarge buffer because scanner uses Reject
This problem has been seen in the PlanAhead tool if the project contains a non-readable UCF file. For example, if the UCF is in a binary format.
This will not occur with all incompatible or invalid UCF files. However, in some cases the UCF file parser will attempt to read an load the invalid file and result in a buffer overflow.
In this situation, the UCF is obviously in the wrong format and should be removed from the project.