Cannot alter or drop a text configuration referenced by a text index

Error constant SQLE_TEXT_CANNOT_ALTER_CONFIG
ODBC 2 State ERROR
ODBC 3 State ERROR
Severity 16
SQLCODE –1168
SQLSTATE WT012
Sybase error code 13345
Probable cause

It is not possible to alter or drop a text configuration referenced by a populated text index or currently being used by a text procedure. Either copy the configuration and alter the copy, or close all cursors on text procedures and truncate all indexes that use the configuration.