When clicking add to plan I receive the following error message:-
required plot capacity cannot be obtained
The works order contains our process. The process is linked to a resource group that contains two resources. The resources appear to have openings in the schedule that would allow additional work to be added.
The Resources required were not available for the work, and that they didn't have shift patterns assigned to them.
However, the jobs that didn't plan before were able to run on any of the remaining equipment and assigned to other machines anyways when they were planned.
From the Resource you can set a Resource as Obsolete, but this is more suitable for a Resource to be removed off the plan permanently.
Remove the resource from the resource group. When the resource is going back into production, you can add it back. The other remaining resources in the group should work as expected.