General Description: When trying to regenerate the Dual Port and Single Port Block RAMs or Distributed Memories by reading in an XCO file generated using an earlier IP update release (C_IP2, C_IP3), the following error may appear in a popup:
"Illegal value FALSE for variable write_mif"
Solution
In the C_IP4 version of the Dual Port and Single Port Block RAMs and Distributed Memories, the WRITE_MIF option must be set to "True" so that the MIF file is always written out by the core.
Edit the .XCO file and change the value of the WRITE_MIF option from "false" to "true", then regenerate the core by reading in the modified .XCO.