Problem

When trying to view VFDs from the Navigator UI, it shows the message "Unable to init VFD session."

The issue is related to the IPC queues. Please check the following to resolve the issue:

1. Check the kernel parameters values for message IPC queues. These should be set as shown in the Gateway Configuration Manual (the details will vary by platform).

2. Stop Gateway with the gatestop command, and then check the following:

(a) Ensure that no Gateway processes are still running. If there are any, kill them (kill -9 in Unix/Linux, End Process in Windows).

(b) (Unix/Linux only) Ensure that no message queues or semaphores used by Gateway are still available. Check this using the command "ipcs grep <xfb user>," and if there are any, remove them with the "ipcrm" command.

Then restart Gateway.