database is locked

[dspady]

i recently opened a database and started to do a search on it. When I got some items to look at and clicked on one of them I got a message, and subsequently several other messages as I clicked on other tree items to see what was going on.
The messages were:
Error updating access date: database is locked
Error expanding tree: database is locked.
Error loading pane: database is locked.
When I looked at the help for "database is locked" I got some stuff that appeared to deal with networking and shared databases. My database is NOT shared and is NOT on a network. When I looked at the directory in which my file resides I noticed that it had a new file with the extent:
urd-journal.
This seems to occur only in association with a search.
When I tried to reset the search I got the message:
Error committing transaction: cannot commit transaction-SQL statements in progress.
Also, I do not seem to be able to use the Search for: box. I have to use the advanced search box.
What is going on. I copied a backup version of the file to my directory and the same thing is occurring. Do I have a corrupt Ultra Recall, or what?
This is potentially a big problem to me.