Source:  FILESYS.NLM

Possible Cause:  The system needs to allocate another directory block on the volume, and it needs to expand the tables that it uses to track the directory within memory. When the system tried to expand the memory directory tables, there was not enough memory available to allocate the additional directory block. The station making the request will not be able to create the new file or directory.

Action:  Increase the memory available to the server. See "Resolving Server Memory Problems in the Server Operating System Administration Guide.