Answers in this category: I get an error message saying "Error opening the configuration database ..." when I try to start 1st Class GradeBook. What should I do? I get an error saying "...not a valid win32 application." When I try to "Make Installation Disks" I get a "DISK FULL" error message. What should I do? I cannot login. I get an error message saying that I am licensed for 0 users. What is wrong? I get a VERSION MISMATCH error or an UNEXPECTED ERROR when I try to start the gradebook. What should I do? I get a ILLEGAL INSTRUCTION or a GPF error when I try to run 1st Class GradeBook. What should I do? How do I backup/restore my grades database files to a removable media device other than a floppy disk? (ie. a zip drive) I am receiving "16 bit windows subsystem" error I get a file error: cannot find shell.dll I get a general protection error / VBRUN300.DLL error, What do I do? New Item