Version Found: MIG UltraScale v7.0
Version Resolved: See (Xilinx Answer 58435)
After prohibits are set on I/O pins within I/O Pin Planner, if the Memory Byte/Bank Planner is opened, the prohibit pins are not honored.
For example, if prohibits are set on I/Os within bank 46 byte 2, the Memory Byte/Bank Planner allows placement of a memory byte group to bank 46 byte 2.
No errors are generated within the Memory Bank/Byte Planner.
However, Tcl errors are generated.
Until this issue is resolved, you will need to do one of the following to work around it:
Manually ensure that memory byte lanes are not assigned to byte lanes containing prohibits.
Move the memory pin(s) assigned to the prohibit location to a free I/O pin within the byte lane after closing the Memory Byte/Bank Planner.