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3.1i XST - WARNING: (DM__0025). Unknown property "maxfanout". Ignoring.
Keywords: XST, attribute, maxfanout, max_fanout, DM__0025, warning
When using the "maxfanout" attribute in a synthesis constraint file, I receive the following warning:
WARNING: (DM__0025). Unknown property "maxfanout". Ignoring.
This is an inconsistency error. The attribute in ISE 3.1i is "max_fanout."
However, if you are running XST in command-line mode, then the attribute is "maxfanout."
Furthermore, if you wish to put this constraint in the HDL code, the constraint is "max_fanout."
NOTE: This problem is fixed in the 4.1i software release.