CAUSE: | You assigned the specified pin with the differential I/O standard to a location, but the Fitter cannot place the pin because no legal location is available on the device. This error may occur for a number of reasons, including conflicting assignments, such as conflicting I/O standard assignments, or the number of pins in the design exceeding the number of differential I/O pins available in the device. |
ACTION: | Change or delete the assignment. |
See also:
Assigning an Entity or Node to a Location
Changing Assignments
Deleting Assignments in the Assignment Organizer
Overview: Making Assignments
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