UCMAPS and UCS-2 and UTF-8 converters

As of OS/390® V2R9, the compiler supported direct use of the UCS-2 and UTF-8 converters; the tables generated by the processing of UCMAPS by the uconvdef utility are no longer used. This is a migration issue if you modified UCMAPS to use the UCS-2 and UTF-8 converters. If you still need to use the modifications that you made to UCMAPS, you will now need to set the _ICONV_UCS2 environment variable to "O". For more information about the _ICONV_UCS2 environment variable, refer to z/OS XL C/C++ Programming Guide.