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Sometimes Report Builder can cause some weird behaviour even though Forms builder seems to work fine. In my Windows 10 Pro machine, I have installed Oracle Dev Suite 10g in Compatibility mode and it was working fine. One day I restarted the computer and tried to open the Report builder, it launches the loading screen but the Report builder window does not appear. It looks like the application minimized on the taskbar. I have closed the app and killed the running tasks, re-opened the app but still the same weird issue.

After doing some research I found the problem is causing because of the x and y axis position in the cauprefs.ora configuration file. So it was located on the DevSuite (Oracle home) directory at C:\oracle\devSuite in my case. Open the configuration file and search for the following lines. Before you make any changes, it is recommended to backup this file by copying to something else in case if you have to revert the changes.

Reports.root_x = "-32000"
Reports.root_y = "-32000"
Reports.root_y = 30

Change the values to the followings –

 

Try open the Report builder, it should appear properly now as seen below.

 

 

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