SQL error #-565

Hi all! We are running Informix ESQL/C rel 4.10 on HP 9000/837s with HP-UX 8.02 ( with Informix-SE engine ). Recently we have got some "-565" error, that is stated as "Cannot read sorted rows". The typical environment could be something like: BEGIN WORK RUN CURSOR WITH AN ORDER BY FETCH INSERT SOMETHING IN A TABLE DIFFERENT FROM THE ONE WE ARE FETCHING END CURSOR COMMIT WORK Normally after 8 FETCHes we have that error. Any hint ? Pietro Komanns peter@cucciolo.sublink.ORG SINDATA R&D Via Rovereto, 17 phone +39-(0)39-60.83.733 20059 Vimercate MI ITALY fax +39-(0)39-60.83.957