I am running RedHat 5.2 with all the updates applied. I have an application that requires the use of two Meteor frame grabber cards and seven cameras. I believe the default shared memory size is 4Mb, which seems to be confirmed by the fact that I can allocate four 1Mb areas in shared memory, but the application complains that it cannot allocate a fifth or more. I tried to increase the amount of shared memory by changing the value of SHMMAX in /usr/src/linux/include/asm-i386/shmparams.h, recompiling and rebooting but it seems to have no effect. I noticed two defines that determine the starting and ending locations in memory for shared memory. Do I need to change the ending point too? Randy Zeitvogel -- To unsubscribe: mail [EMAIL PROTECTED] with "unsubscribe" as the Subject.