Hello All!!! I used Acad2000 in my machine for a long time, for six months more or less I didn't use it, last week when I received a new work I trait to use it but didn't start, it gave an advise of ilegal operation and failed. I uninstall it and after unactivate the antivirus program, I reinstall Acad200, but it failed again for the same reason... I don't know what's happening, someone could help me?. Advise given by Win98SE is: This program has performed an ilegal operation and will be shut down: Details: ACAD caused an invalid page fault in module AC1ST15.DLL at 01a7:65fe1e3b. Registers: EAX=00000000 CS=01a7 EIP=65fe1e3b EFLGS=00010246 EBX=bff77716 SS=01af ESP=00dbf888 EBP=00dbfa54 ECX=00000000 DS=01af ESI=00ee04b0 FS=225f EDX=bff7024c ES=01af EDI=00000001 GS=0000 Bytes at CS:EIP: 8b 10 8d 4e 04 8d 7e 14 89 11 8b 50 04 89 51 04 Stack dump: 00000001 00ee05c0 00ee05a0 64616f4c 7262694c 41797261 bfbebd00 c3c2c1c0 c7c6c5c4 cbcac9c8 cfcecdcc d3d2d1d0 d7d6d5d4 dbdad9d8 dfdedddc c3c2c1c0 Thanks in advance. Repply to: jo_ar(at)bigfoot(dot)com