Autocad symbols editing batch

We have thousands of? 3D drawings, in Autocad 2004 format dwg files,? that are wrongly displayed by Autocad 2008 in 3D views, and we need a batch program to fix them all. ## Deliverables We have found out that this problem: -? only occurs? with version 2008 of Autocad. 2004, 5, 6, 7, 9 are working fine; - occurs with entities that have a thickness different from 0; - is avoided when we move the entity on a different existing layer (ex. to layer "PQ_204_3D"). We finally need to have the entities in the layers they are belonging to right now. In the attached zip file you can find a dwg, and 2 images showing the correct 2D view, and the wrong 3D view. We expect to get a fixed dwg file as an example of the final work, together with the offer. Before approving the quotation we will provide other 5 files for you to test your batch procedure. In total we will need to fix more than 1000 files of that similar size.