Got error 243 : Could not position within a table table-name

Hi, when several processes are trying to update the same row in the same table, i got the error 243. It's very strange, because this error seems related to an hardware error (see finderr). But the table seems Ok because the oncheck utility didn't detect a problem. Also the program is designed like this: - set lock mode to wait 100 - select for update - update row, BUT the process got the error immediately. It didn't wait 100 seconds. My questions are: - why the process didn't wait ? - what can cause the error 243. My configuration is : Informix 7.20 on AIX 4.1.5. Thanks for any responses. -- Regards. ________________________________________________ yakov.berkovitch@telrad.co.il (972)-89134414