When attempting to insert a symbol, create a project page, or possibly upon other actions, an error message that includes "eNotImplementedYet" is displayed.
This indicates that a DWG file involved in the operation has been saved in a newer DWG format than AutoCAD platform being used with Promis.e. In the case of inserting a symbol, the DWG file for the symbol in the catalog folder is in a newer format. In the case of creating a project page, the page template file is in a newer format.
If other users that are sharing Promis.e data are using a version of AutoCAD with Promis.e that uses a newer DWG format, upgrading to the same version of AutoCAD is recommended.
If the DWG in question was opened in a newer version of AutoCAD that is not being used with Promis.e, use that version of AutoCAD to open the DWG file again and save it back to the DWG format compatible with the AutoCAD being used with Promis.e.
Symbol, macro, and title block DWG files are located in catalog folders specified on Setup > Catalog Paths.
Page template files are typically located in the "\Templates\Page" subfolder of the Promise Data folder. Check Setup > System Paths to verify this location.
http://en.wikipedia.org/wiki/.dwg#Version_history