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/