NDPSJPMComm error

One of my servers just locked up today. The error:

NDPSJPMComm failed with error -907, opcode: 106 had repeated a few times
before the server just locked.

It happened at lunch, by the time I hurried back from lunch the server had
locked up cold. I could not change screens or see any stats. I could
only use the power switch to restart.

The server is a Netware 6.5 sp6 server. The server is basically file and
print.

Now from the TID 3778083, the error nothing. But the server locked up
right after the error started.

After the reboot, I saw nothing in the error logs.

ideas anyone.

thanks
Phil J