Emulator showing errors

MIT App Inventor Help
1

In MIT App Inventor I got this message: Error from Companion: Attempt to invoke virtual method 'java.lang.String java.lang.Throwable.toString()' on a null object reference

I would copy the log but I can't figur


e out how to do it in Windows so I recorded a video instead.

2

Why not:
search

3

I already searched, and it seems the problem is that I’m using an outdated companion, (2.65 not 2.66) but I don’t know how to update it. None of the topics explain how to update it.

4
5

Welcome David.

See the section on Troubleshooting in Installing and Running the Emulator to get instructions about one way to update Companion to the emulator.

6

I tried using this method, but for some reason nothing was happening on my emulator screen.

7

Try loading a simple project; what happens? Does the Companion upgrade?

If it upgrades and still doesn't run I expect you have issues with your game coding.

8

I see you are using the aistarter technique (Connect->emulator), the most difficult one to sync.

It's much easier if you can get an emulator up and running on its own, with a Companion downloaded and installed onto it under your own control.

9

It still doesn't update and displays three blank buttons, even when I made a blank project.

10

How would I be able to do that?

11

See the Other Emulators section of Emulator showing errors - #4 by ABG

Alternatively, export your .aia here for one of us to examine.