A gateway process cannot find a free slot in the PROC table in shared memory. When a GWADM starts up, it reads the TUXCONFIG file to determine the maximum number of processes in its GROUP so that it can allocate space for that many slots. However, after the GWADM is booted, if the MAX parameter for this GROUP's gateway processes in the SERVERS section of the TUXCONFIG file is increased using tmadmin, then the additional processes can't be booted because there is no more space in the shared memory that was computed at boot-time.