Shared memory segments never freed

Hi all, On one of our systems we have the following problem: RS6000 AIX 4.3.2.0 IDS version 7.30.UC6 One of the application programs adds 3 shared memory segments in. When the program is terminated, this shared memory segments are never automaticaly freed (see output of onstat -g seg) Informix Dynamic Server Version 7.30.UC6 -- On-Line -- Up 6 days 18:33:05 -- 246112 Kbytes Segment Summary: id key addr size ovhd class blkused blkfree 1 1394821121 30000000 48087040 1592 R 5862 8 2 1394821122 40000000 153600000 2940 V 18651 99 3 1394821123 50000000 606208 608 M 67 7 131077 1394821124 60000000 8388608 724 V 868 156 131076 1394821125 70000000 8388608 724 V 206 818 6 1394821126 80000000 8388608 724 V 8 1016 1310727 1394821127 90000000 8388608 724 V 1 1023 131080 1394821128 a0000000 8388608 724 V 1 1023 1048585 1394821129 b0000000 8388608 724 V 1 1023 Total: - - 252624896 - - 25665 5173 If we execute an onmode -F the 3 shared memory segments are freed. Why are they not automaticaly freed ? Thanks for any input, Doris