You should note that the WDC_Field_Security_Tag_TEMP table is used by Field Level Security to track the triggers it registers for its Field Security IDs. It was originally written by me as Winthrop Dexterity Consultants, hence the WDC prefix, but was purchased by Microsoft as part of the Advanced Security product. This table is actually a Memory Table not a local Temporary Table. Local Temporary Tables are implemented as ctree (TNT*.dat and TNT*.idx) in the %TEMP% folder. Memory tables are implemented as named ctree *.dat and *.idx files in a TNT* folder in the %TEMP% folder. The issue with local Temporary Tables AND Memory Tables was documented on my Developing for Dynamics GP blog in 2009 and 2010. Now on my WinthropDC blog: winthropdc.wordpress.com/.../ winthropdc.wordpress.com/.../ Many products including GP Power Tools (previously known as the Support Debugging Tool) use local Temp and Memory tables and can have the same problem. winthropdc.wordpress.com/.../ Regards David