What is the exact symptom (SAS error message) you receive and after what SAS code (executed) do you receive the message?
If you search the SAS support website for the file-extension, it is referred to as ITEMSTOR files, used for various purposes. If you do get some SAS error, suggest focusing on the problem by contacting SAS technical support or reply back to the forum for feedback.
Scott Barry
SBBWorks, Inc.
Recommended Google advanced search argument this topic/post:
sas7bitm itemstor files 9.2 site:sas.com
Problem Note 37490: The WORK library can fill up with temporary itemstores when running ODS GRAPHICS procedures
http://support.sas.com/kb/37/490.html
Message was edited by: sbb