Problem summary
In Nuke10 (And older versions), when rendering a Container Format (i.e. .mov files) you could select the option to 'Background Render' the file.
This allowed the user to continue working while making a preview of their work for example.
With Nuke11's introduction of the Frame Server, It is no longer possible to background render Container Format files (.mov files).
Customer reported version
nuke.11.0v1
Customer reported platform
windows10
Steps to reproduce
1) Open nuke, connect a CheckerBoard node to a Write node
2) In the Write node, set the file's format to '.mov'
3) Render the write node with 'Use Frame Server' ticked
Result)
The below warning will appear, stating that it is currently not possible to render Container Format nodes
Workaround
1) Render your scene as an image sequence using the Frame Server.
2) Read your newly created image sequence and attach it to a duplicate of your write node.
3) Render your new write node as a '.mov' file normally.
OR
Render your script via the command line while working on your project.
More information on Nuke command line operations can be found via the URL below: