It happen again. I have an mxd file with some relative small data, all located on an sde database. I went to arc catalog and selected a DWG file, i assigned the Projection, then i dragged the DWG into ArcMap, it crashed and closed ArcMap. I went to go open it again and it was gone. It deleted my MXD. Its not on recent Open nor in my documents. Anyone have any ideas???