@Mitch Bailey Now, I am facing this error I have tried by another way to clear the DRC. Can you help me there ?

Have you looked at the pin in question? The message seems clear

Yes, I have seen

Does the pin have shapes?

Actually, I am running my design on default script

It would be best if you open an issue with the associated data. My guess is that the pin has no shapes. If you want to investigate further I would run flow.tcl with -gui and look at that pin

Let me check