Improper shutdown (power outage) broke UI Designer


I was working in UI Designer when my home power system glitched. Since restart every time I try to open UI Designer I get message "This localhost page can’t be found No webpage was found for the web address: http://localhost:63713/bonita/#/en/home", with variation of the port number each time I restart the Studio.

I realize that generally a UPS would be employed to protect one's hardware from this sort of thing so this issue as a bug is questionable, but perhaps nonetheless this is not desirable behavior. I will be happy to help track down what got scrambled.


Win10, Chrome 75.0.3770.80

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Installed 7.8.4...


Antoine Mottier
June 26, 2019, 3:03 PM

Issue is probably related to the file TestModal.json located inside the .metadata folder itself inside web_pages folder. This json file is empty leading to a failure in the parsing.

Antoine Mottier
June 26, 2019, 3:29 PM

You probably should also delete the file .index.json located as well in .metadata folder as it seems also corrupted (it should be readable JSON).

Antoine Mottier
August 20, 2019, 12:47 PM

Have you been able to recover your UI Designer work using my comments above?

As I’m not able to reproduce such corruption I think I will close this issue.

edward geyh
August 22, 2019, 3:15 PM

Hi Antoine,

Removing the files you identified solved the problem. I had not lost any significant work; my report was only to identify a potential issue for someone in the future. Regards -

Antoine Mottier
August 22, 2019, 3:18 PM

Thanks for the update. As I was not able to reproduce the issue even with killing all Studio and UI Designer process (with kill -9 command) I will close this issue for now. My best guess is that corruption come from this unexpected shutdown and I think there is not much we can do about it. If we managed to find a scenario to reproduce the issue we can then reopen this ticket and investigate potential solutions.

Cannot Reproduce


Antoine Mottier


edward geyh

Affects versions



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