Ranorex Forum

I have a Java application that uses SWT for windowing. The application includes several dialogs, some of which contain a progress bar (SWT class: ProgressBar) control. I am automating the application using a C# program which interfaces with the Ranorex library. Whenever I use Ranorex.ElementSnapshot to take a snapshot of a dialog containing a ProgressBar and save the snapshot to a PNG file, the PNG file is created and appears correct, but the Java program immediately crashes. According to the log file, the error is a Java Virtual Machine error (illegal access). One of the frames mentioned in the log file is the ProgressBar window procedure.

If anyone has a clue as to why this happens, please help. Thanks.

I tried to reproduce the crash with the SWT progressbar, but without success.
When exactly does your application crash ?

If you only need a picture of your dialog (and not a snapshot which also includes complete element information) try Imaging.CaptureImage() instead, which should be safe (but does not work with hidden windows)


Michael
Ranorex Team

Imaging.CaptureImage works without crashing, however, it has the disadvantage that it copies whatever is in the background at the corners of a window. This can interfere with the screenshot comparisons in the automated GUI tests I am developing. (Hidden windows are not a problem, as the screenshots are always of the window in the foreground.)

I will continue to experiment with this problem.