I had the same problem and did call the service support. There is no way you may downgrade the file. The only suggestion I got is to install different versions of solidworks . . c4 T0 H6 J) ?' w2 I ' U8 V0 [' C; ~" z: q6 {$ @3 CI had another probem. I am using solidworks 2007 english version. My colleague could not open in 2007 Chinese version. Do yo guys have the same probem?