What does order rejection error "RMS:Blocked for SCRIP nse_cm CNC broker- ZERODHA Remarks: Security is in GSM block type: ALL" mean?

RMS:Blocked for SCRIP nse_cm CNC broker- ZERODHA Remarks: Security is in GSM block type: ALL

The stock is under Graded Surveillance measures from the Exchange is currently either not traded or traded on exchange stipulated day.

So orders placed to buy or sell such stocks will be rejected & the above error will be displayed.