On Sun Solaris, the message queue parameters are modified by editing the file /etc/system and then rebooting the system. For example, the parameter MSGMNI can be changed from the default value (usually 50) to 100 by adding the line "set msgsys:msginfo_msgmni = 100" to /etc/system.

Some of the message queue parameters can be set in the "scoadmin" Hardware/Kernel Manager, but others can only be configured by using the idtune utility. For example, the command "/etc/conf/bin/idtune MSGMNI 100" would set the maximum number of message queues to 100. Since each user and phantom port requires each own message queue, a maximum of 100 would be adequate for approximately 100 users (more may be needed by the operating system and other software products). After changing a message queue parameter, the kernel must relinked using "scoadmin" and the system must be rebooted.

SCO OpenServer 5 requires passport version 3.5.1 or later.

Related Article: Technical News, April 22, 1996: Passport 3.5.1

Before proceeding, please be certain that there are no dL4, UniBasic, or IQ users on your system before removing current license.

Kill the running passport daemon and remove the /etc/DCI/license file. Restart the passport daemon by running /etc/DCI/passport.cmd after removing the /etc/DCI/license file. Remember to acquire and enter a new SSN prior to using dL4, UniBasic, or IQ.

This error is reported by the operating system when the message queue buffers are full. Although it is possible that the system message queue buffer size was set too low, the more likely cause is unread messages. A common programming error is not to clear system signals after an INPUT TIM statement for an IRIS program. This error can also be reported when UniBasic, dL4, or