I have a several Aristos systems running VB21D application software, and all of them have random application errors causing the application to crash.  I have Ghost backups of each system, but the errors still show up.  I have a patch CD for VB21D, but do not have the full software disc for VB21A, B, or C.  These systems are EOL, and Siemens will not help.  I have also exhausted all third-party service companies.