Memory problems on AIX

Fellow Informix users: We are having a problem with one of our client sites which has not been a problem at any other site. The client is running an Informix 4.00 UE1 Online engine on an IBM PS/2 model 90 machine with IBM AIX UNIX 1.2.1 as the OS. The 4GL code is compiled into RDS (runner release is 4.00 UE1). The problem is that at different points of the program, at different times (nothing consistent), the program aborts with one of the following error messages: a) -4518 The 4GL program cannot allocate any more space for temporary string storage. b) Segmentation fault (unknown error number) Does anyone have any insight as to what the problem might be, and what quick (or, semi-quick) solution there might be? Thanks in advance for your help, Melissa Lewis (mlewis@dssmktg.com) -- Melissa Lewis, Programmer/Analyst Data Systems Support 1228 Shelly Court