defunct sqlexecd

Informix SE 7.10.UC1 Digital Unix 3.2d Intersolv 16-bit ODBC drivers V2.11 for Windows Problem: ======== Every time a client connects via ODBC to our Informix database a defunct process is created which is a child of the sqlexecd dameon. These defunct processes continue to increase in numbers as users execute queries, but never get cleaned up and eventually consume, for lack of a better word, all the DEC's resources, ie I receive "unable to fork" messages. The only way to return the system to normal is to kill the sqlexecd daemon and restart it (or reboot). Once I kill the sqlexecd dameon all the defunct process disappear. Can someone explain what might be causing this problem? Does it look like a problem caused by the client or the server ? Thanks, Juergen