Syntax options:

    QUIET COMMIT ON | QUIET COMMIT OFF

    The QUIET COMMIT ON clause disables error reporting for the
    COMMIT and ROLLBACK statements if either statement is executed
    when no transaction is active. The QUIET COMMIT OFF clause
    enables error reporting for the COMMIT and ROLLBACK statements
    if either statement is executed when no transaction is active:

    MODULE TXN_CONTROL
    LANGUAGE BASIC
    PARAMETER COLONS
    QUIET COMMIT ON
    PROCEDURE S_TXN (SQLCODE);
    SET TRANSACTION READ WRITE;

    PROCEDURE C_TXN (SQLCODE);
    COMMIT;

    The QUIET COMMIT OFF clause is the default.