Thanks Julie for the reply.



The resources calendar shows availability during this time. Also when I add this resource to another fixed duration task during the same timeframe there is no error on the task.

Okay - let's try a bit more information. You mention that the resource is assigned to another task that overlaps. Are you creating a resource overallocation? Is your leveling set to automatic? What is the peak unit for the resource's during the overlap? What is the resource's max units?

Can you attach a picture or perhaps the file?