A new format specifier, CS_FMT_SUBS_ILL_CHAR, has been added to the 'format' bitmask element of the CS_DATAFMT structure to allow conversion of illegal characters sent by Adaptive Server.
When the Adaptive Server uses the enable permissive unicode configuration parameter, the client may receive illegal unicode characters. Set CS_FMT_SUBS_ILL_CHAR to allow non-Unicode data to be successfully converted.
Versions earlier than 15.7, reported errors when encountering illegal characters.