The built-in function &SYSTWOBYTE translates an EBCDIC string into the double-byte character set (DBCS). The valid DBCS code points that correspond to EBCDIC data and can be translated are ‘4040’ and ‘42db’ where db is a code point in the range of ‘41’ to ‘FE’ In this error, the &SYSTWOBYTE built-in function was issued for EBCDIC data outside of the range ‘40’ to ‘FE’ and translation to DBCS was not possible.

To correct the error, remove any EBCDIC data outside of the range ‘40’ to ‘FE’ from the &SYSTWOBYTE string. For more information about &SYSTWOBYTE and DBCS, see z/OS TSO/E CLISTs.