Message Oracle PCB-00206 - Cannot use N quoted literal in PL/SQL when NLS_LOCAL=YES

ERRORCannot use N quoted literal in PL/SQL when NLS_LOCAL=YES
CAUSEA N literal (a literal of the form N...) was used within a PL/SQL block when the precompiler option NLS_LOCAL=YES was used. N literals are not supported in this situation.
ACTIONUse an ordinary literal (one without the N) within the PL/SQL block or use precompiler option NLS_LOCAL=NO.