When posting messages, we need to know the message number: giving us just the text deprives us of the ability to research the problem. Also include the attempted command, so that we have a better sense of the situation.
One thing I would check for is the presence of a Restartable Restore: I would expect that to lock a filespace rather than a node, but lacking full context, I can't be sure of your problem there. Do Query Restore and check for that, first. Richard Sims http://people.bu.edu/rbs/
