Cannot establish conversion between <codeset> and UCS-2

If you invoke the FTP client under TSO, and issue a TYPE U2 or UCS2 subcommand, the following message might be issued:

 EZA2749E Cannot establish conversion between <codeset>
           and UCS-2.  

To transfer data encoded in UCS-2 during an FTP session, invoke the FTP command with the _ICONV_UCS2_PREFIX environment variable, specifying the prefix used for your runtime library. Following is an example:

FTP ENVAR("_ICONV_UCS2_PREFIX=CEE.OSVIR4") / <host_ip_addr> <port>