4GL: SQLCA.SQLERRD[2] = 0 after insert in serial field

Dear Informixers, I've been encountering a puzzling problem in a 4GL application. 4GL version is 7.20UD1 (ancient I know, but we've been using this version w/o any problems for years) running on Reliant Unix 5.43, Server is IDS 7.31UD5 on Linux (SuSE 7.2). An INSERT statement inserts a record with a serial column. The value of the serial is "0" before the insert, and the generated serial value is retrieved with the following statement: LET p_stamm.s_doknr = SQLCA.SQLERRD[2] This has been working without any problems for years, and the program code in this module has also not been changed. Sudden- ly, this statement leaves "p_stamm.s_doknr" at value "0", even though the insert was executed successfully. I'm aware there was a problem in previous versions of IDS 7.31 that led to this problem, but this has been fixed and is definitely not the case in 7.31UD5. I'm clueless about what's happening here. Could this be a performance problem? I've been noticing that I have check- point durations of 1 second lately, while they used to be mostly 0 seconds. Does anybody here have a clue? Regards, Richard -- +-------------------------------+-------------------------------+ | Dr. med Richard Spitz | Tel : +49-89-7095-6110 | | Klinik f'r Anaesthesiologie | FAX : +49-89-7095-6420 | | Klinikum der Univ. M'nchen | Page: +49-89-7095-789-2116 | | 81366 M'nchen, Germany | | +-------------------------------+-------------------------------+