Memory fault/Segmention fault executing a SELECT statement

Hi, i've some serious problems with the following SELECT SELECT a,b,c,d,e,f FROM t1, t2, t3 WHERE joining conditions INTO TEMP t_tmp WITH NO LOG Fields a-f have a size of about 50 Bytes and according to the joining condition the SELECT should retrieve about 1200000 rows (number of records in the largest table t3). The rootdbs has about 450000 pages free. What happens: After running about 3 hours the 4GL programs crashes with memory fault or segmentation fault (three tries up to now) during the select (i put some debugging displays before and after the select). The online log shows nothing serious to the time when the core was dumped. I've now started the select again and will log rootdbs free space with tbstat -d every 5 minutes (hint from the Siemens hotline) to see if rootdbs will overflow. Result tomorrow. But even if this was the reason for the error, i think there should be a clean error reporting. Environment: 4GL V4.1A10 Online V5.0B00 on a Siemens RM400. Greetings, Joerg