Thank you... I do that and it 's ok for a short time... Because now, I have again the problem (when I open a drawing, I have ACIS error 61006 and I have only a part of my drawing, but on the preview before my drawing'opening, I see all)... And when I load "satfixer.arx" and recoveracis, Autocad gives me this message : *** ACIS data recovery failed. The current drawing has been discarded. If the ACIS error message, "Missing double in restore file.", was issued immediately after the RECOVERACIS command started, then the original file was probably valid and it does not need recovery. Otherwise, the drawing contains ACIS-based entities for which the ACIS data has been lost and recovery is not possible from that version of the file. Please try recovery on a backup of the file. _.NEW Really want to discard all changes to drawing? <N> _Y Enter template file (or . for none) <C:\Program Files\AutoCAD R14\template\acadiso.dwt>: AutoCAD bonus utilities loaded. Regenerating drawing. In the explanation of satfixer, I saw it's the ase.arx's version who gives me problem... What I can do now ?