Project "StayingHealthyTogether" not opening after Screen2 deletion and checkpoint issues

MIT App Inventor Help
1

TL;DR

My project StayingHealthyTogether stopped opening after I deleted Screen2 and attempted to delete a checkpoint version. The checkpoint app still works, but the main app is inaccessible. I suspect corruption in Screen2 or the checkpoint system. Looking for recovery advice or confirmation if this is a known bug.
Hello community,

I’m experiencing a serious issue with my project StayingHealthyTogether in MIT App Inventor. After working with Screen2 and the checkpoint system, the project stopped opening entirely. Here’s the sequence of events:

  1. I deleted all components from Screen2.
  2. I attempted to delete the checkpoint version of the project.
  3. After that, the main project would not open.

During app testing, I noticed the following behavior with the Delete button:

  • Entered data (date, time, glucose, notes) → pressed Save → data appeared in ListView.
  • Pressed Reset → fields cleared.
  • Highlighted an item in ListView → pressed Delete.
  • First dialog: “Info, no item selected” → pressed OK.
  • Second dialog: “Confirm Delete, delete this reading?” → pressed Yes.
  • All content disappeared from ListView, but another “Info, no item selected” dialog appeared immediately.

After this sequence, the project stopped opening and I received the bug report prompt.

Additional observations:

  • The checkpoint version is still accessible and working.
  • However, the main app (StayingHealthyTogether) remains unable to open.
  • When I tried to delete Screen2 in the checkpoint app, I received another bug report.
  • As of today, Screen2 in the checkpoint app now shows a background image with a label text, but the main app is still inaccessible.

Could this be a corruption issue with Screen2 or with the checkpoint system itself? Has anyone else experienced similar behavior, and is there a way to recover the main project?

Thank you for any guidance or troubleshooting steps.

2

Can you simply use the checkpoint version as your main app (rename it, make another copy) ?

3

This URL allows you to open AI2 to the Project List, without opening any project.
http://ai2.appinventor.mit.edu/?autoload=false
From that list, you can request Exports of Projects without trying to open them.
Upload the troublesome .aia here.

The aia can be editted to set the last opened screen to Screen1, using 7zip and Notepad++.

4

Yes, I have, but if there's a bug, I would like to tackle that issue.

5

Thank you for the detailed steps. I’ll try opening AI2 with the ?autoload=false URL and export the corrupted project. If I can get the .aia out, I’ll attempt the 7zip/Notepad++ edit to reset the last opened screen to Screen1. That sounds like a solid recovery path. I’ll report back here with the results once I’ve tested it.

6

for detailed step by step instructions.

From

7

Issue resolved. Thanks for the advice.

8

This is a sharing community. Your resolution may help others. You could share what you did to fix things.

1 Like
9

I rely heavily on artificial intelligence to help me with building my first app. Eventually I will get the hang of it. This is just a hobby for a retired veteran. You folks are great here.