Normajean,

The error is a not very well documented error message. Best guess is that either an I\O bottleneck or CPU\Memory pressure caused a situation where queries were waiting to long to acquire a latch ( a kind of light-weight lock ). In this situation I fell back on a tried and tested problem resolution: I restarted SQL Server. Sometimes, you just have to shrug your shoulders, re-boot, and move on!

Gordon