Message Oracle PCB-00321 - Implicit varchar host variables are an Oracle extension

ERRORImplicit varchar host variables are an Oracle extension
CAUSEAn Oracle extension to the ANSI/ISO SQL standard was used. Specifically, an iimplicit varchar variable was used in a SQL statement. This informational message is issued by the FIPS Flagger when FIPS=YES.
ACTIONNo action is required. However, for ANSI/ISO compliance, do not use this statement.