Cannot create an index on Java class '%1'

Error constant SQLE_CANNOT_INDEX_ON_JAVA_CLASS
ODBC 2 State ERROR
ODBC 3 State ERROR
Parameter 1 The name of the class.
Severity 16
SQLCODE –704
SQLSTATE WW022
Sybase error code 13748
Probable cause

An operation requiring an index was attempted in which an attempt was made to create an index on a Java class type.