OpManager Error 12029

OpManager Error 12029

Hi,
 
We are using Opmanager to monitor WAN activity in real-time, and for that we set up a monitor in the communications department.
 
The thing is, that after a while, Opmanager will start showing this error message:
 
12029: Unknown
 
We have to clear that error window in order to keep seeing the real-time graphs, but since the browser is opened on a dedicated computer, directly connected to the monitor, this is not acceptable.
 
Any ideas why this error happens? and more importantly how to fix it?
 
Regards,

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