Hi, Thanks for the great info. It was a very old lightburn project file that brought up the error. Upon another lightburn users recommendation I did an uninstall of lightburn after a backup, then deleted all lightburn files and directories, and deletion of lightburn registry entries. Then a fresh install of the latest version, then restored my settings and no issue any longer. It opens and brings up the file that caused the error and now everything works without any issue. Sincerely thank you that contributed.