ID:170099 Cannot parse Routing Constraints File on line <number> -- string "<name>" is not valid. Constrained routing will be turned off.

CAUSE: You specified that the Fitter use the back-annotated routing constraints during compilation.However, the Quartus Prime software cannot parse the specified line in the Routing Constraints File (.rcf) because the specified string is not valid. As a result, the Quartus Prime software will ignore the RCF File and routing will continue without any constraints.

ACTION: No action is required.