Versant 80/180 - stuck at "Raster Generation Completed"

[print1510W]

Here's the screenshot. 

I noticed that in this instance. It was when I changed the Paper Tray 3 Attributes on the machine then when I went back to the server, the Paper Tray 3 Attributes were not updated. I restarted the machine and the server. After boot-up, the machine and the server had the same paper attributes for tray 3. I found the job on the error list and simply restarted printing it and it did with no delay.

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GX-i Print Server for the Versant 180 Press
Version 1.6.6.2
Print Station 1.6.6.2

No fault codes appear on the machine and nothing blinking on the server side.

I'll post a screenshot the next time I encounter it.

[Joe Arseneau]

What is the exact error and where does it display? (Fiery/Freeflow/IOT)

Is there a fault code on the printer at the same time?

[print1510W]

I usually have jobs go straight to "Waiting to Print" status but sometimes it just gets stuck to "Raster Generation Completed" status. I have to restart the machine then restart printing from the Error list which starts the actual printing. But why does this happen?