ID:20101 If IOPLLs "<merged IOPLL atom>" and "<merged IOPLL atom>" merge, the design becomes non-routable. To rotate the ports, manually combine these IOPLLs or turn off automatic IOPLL merging.

CAUSE: IOPLL port rotation cannot be performed on merged IOPLLs.

ACTION: Either manually combine IOPLLs \"%1!s!\" and \"%1!s!\" into a single IOPLL in the design, or turn on assignment UNFORCE_MERGE_PLL for both IOPLL instances.