Could not execute backup/restore DLL (%1) entry point

Error constant SQLE_BACKUP_ENTRY_NOT_FOUND
ODBC 2 State ERROR
ODBC 3 State ERROR
Parameter 1 The name of the entry point that could not be found.
Severity 19
SQLCODE –692
SQLSTATE 08W45
Sybase error code 13719
Probable cause

An attempt to locate or execute the backup/restore DLL entry point failed.