Character substitution occurred when converting from %1 to %2

Error constant SQLE_SIMPLE_SUBSTITUTION_WARNING
ODBC 2 state 01000
ODBC 3 state 01000
Parameter 1 The character set of the input string.
Parameter 2 The character set of the output string.
Severity 10
SQLCODE 127
SQLSTATE 01WC3
Sybase error code 13896
 Probable cause