Hey Guys, I have been working on an app for several weeks and did never get the live view to crash. But since some days the app crashed regularly. Sometimes right after start and everytime when loading one special screen. I have checked all blocks but can not find a problem. What bothers me: the c…

Look for somewhere where you’re feeding a block something it can’t handle. Getting object properties of a non-object, getting item 4 of a two item list, inserting a list item into a variable that doesn’t have a list, setting something to a variable that isn’t defined, etc. If you have a consistent…

The first thing comes to mind is stored variables. Are they used in your app and how are you handling them? The other thing is the famous API and next is computations that would lead unexpected results.

Ah, the API. The perpetual enemy and bane of any Thunker. That’s a very likely possibility.

I make heavy use of them. What thinks should I look out for?

Always check if the stored variable is null before performing any operation on it. Thunkable cannot correctly add a list to any variable that is null. If you are trying to add a list to app variable or stored variable then check if null first and assign it Empty List block first.

Thanks for the advice! When initializing a stored variable, would you recommend to assign it an empty text/list/object instead of null?

Yes, Thunkable does not know what to do when it encounters null. This is the reason you get the crash. So unless you do not deliberately want a null, you should avoid it in the code.

You can try my method of debugging: [image] Debugging in Thunkable X (Video) Tutorials and DIY Guides I thought I’d share a process I use for debugging my projects. It involves creating a function that can be used over and over throughout the code blocks in order to help …

Hi Muneer, I have a “followup question”: When you told me about the problems thunkable has with null I changed the initialization of my variables to an empty string (the red textblock). I just found a bug in my code where it always crashed: I assignet an “app variable” with an empty string to th…

Debugging Crashes in live view

Questions about Thunkable X

tatiang April 29, 2021, 2:55pm 10

You can try my method of debugging:

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Debugging Crashes in live view

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