Keywords: CoolRunner, fitter, xor, collapse
XST now has problems fitting designs in CPLDs that used to fit using version 6.x. The following errors might be produced after fitting:
"ERROR:Cpld:887 - Cannot fit the design into this device."
"ERROR:Cpld:868 - Cannot fit the design into any of the specified devices with the selected implementation options."
"ERROR: Fit failed."