When using PowerBuilder8 in these days, open one of DataWindow, the system-level error, track with Visual C 6 Debug, found that one of the PBDEV8.DLL of PB has an error in the system. Original PB system File,. Then use PB to reinstall, but after opening DataWindow, there is still an original problem. Finally, through the system's registry, query all PowerBuilder registration files, delete it. Then the system is restarted This fault will no longer occur.