ID:12561 Pad <number> of non-differential I/O pin '<name>' in pin location <name> is too close to pad <number> of differential I/O pin '<name>' in pin location <name> -- pads must be separated based on Cyclone V differential pad placement rule in Cyclone V Pin Connection Guideline document. Please use the Pad Mapping file to debug.

CAUSE: You assigned the specified I/O pin with a non-differential I/O standard assignment to the specified pin location in the device that is too close to the specified differential pin in the specified location. Differential and non-differential I/O pins must be separated by the specified amount of device resources.

ACTION: Use the Pad Mapping file to debug the pad placement, and then assign one of the conflicting I/O pins to a different location.