This error appears when you attempt to export a GCF constraint file from your Designer ADB file.
This error indicates one of the following:
Libero cannot find Designer
The ADB file is corrupted (EDIF not found)
The ADB file does not have any GCF constraint files
Review the Designer log file to determine which of the above scenarios caused the error (right-click Designer in the Libero Flow window and select View Log file).
If you run Designer and audit (re-import) the PALACE output GCF constraint file (top_palace.gcf), you will lose your pin constraints. The top_palace.gcf file does not include them. See the Using PALACE with Libero topic for more information.