Did you try a clean and build ?
I did, however because I was under a time constraint I tried to figure a way around the problem. the clean and build did not work, but when an op amp in my design was switched to the PSOC CY8CKIT-049-42xx, and connected to the -059-, it was able to assign pins. not sure why this error occurred but this was my solution around it. thank you for your time.