Warning 072: Could not satisfy all constant pins and disable values on logic block {block}

Could not satisfy all constant pins and disable values on logic block block. This may be due to conflicting requirements, lack of access or lack of a suitable state in the truth table. Running Connection Test may give more information.

The constants and disable values specified on the nets of the logic block are not possible to apply. This can be because they conflict with each other, or there is insufficient access to the logic block to drive the value. Alternatively it may be trying to set up a logic state which is not present in the truthtable for the logic block. Running Connection Test may give more information about the exact problem.