Return_Values

   x                  A conversion descriptor. Indicates the call
                      was successful. This descriptor is used in
                      subsequent calls to iconv
   (iconv_t) -1       Indicates an error occurred. The function sets
                      errno to one of the following:

                      o  EMFILE - The process does not have enough
                         I/O channels to open a file.

                      o  ENOMEM - Insufficient space is available.

                      o  EINVAL - The conversion specified by
                         fromcode and tocode is not supported.

                      o  EVMSERR - Nontranslatable OpenVMS error
                         occur. vaxc$errno contains the OpenVMS
                         error code. A value of SS$_BADCHKSUM in
                         vaxc$errno indicates that a conversion
                         table file was found, but its contents is
                         corrupted. A value of SS$_IDMISMATCH in
                         vaxc$errno indicates that the conversion
                         table file version does not match the
                         version of the C Run-Time Library.