The character conversion table specified on the OMVS command is not usable. The specified table converts between ASCII and EBCDIC characters. The OMVS command cannot use a conversion table that performs this conversion.
The OMVS command ends and returns to TSO/E, without starting a shell session.
Make sure that any character conversion tables that are provided for use with the OMVS command do not convert to or from ASCII. If this error message appeared when the CONVERT keyword was not specified on the OMVS command, make sure the default table for the OMVS command does not convert to and from ASCII.
If the CONVERT keyword on the OMVS command was used to override the default character conversion table name, specify a different table. The table must not perform ASCII to EBCDIC conversion. If the CONVERT keyword was not used, contact the system programmer.