# Crash Logs - Could help troubleshoot the app building progress and reduce frustration of searching for a problems when apps crash
**URL:** https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451
**Category:** Feature Requests
**Created:** [May 18, 2022, 3:05pm UTC](https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451 "2022-05-18T15:05:45Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@exploriverse.com](https://community.thunkable.com/u/exploriverse.com)
#### Post date: [May 18, 2022, 3:05pm UTC](https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451/1 "2022-05-18T15:05:45Z")
Thankfully I’ve only run into this twice. I am testing a new build of my app in testflight(ios) or internal(android) and I’ll experience a white screen, meaning the app crashed. In this case what would be helpful is an error message displayed which line of code it crashed on.
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### Author:  [@exploriverse.com](https://community.thunkable.com/u/exploriverse.com)
#### Post date: [May 22, 2022, 4:52am UTC](https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451/2 "2022-05-22T04:52:24Z")
Anyone know what causes crashes?
1. block errors
2. calling variables before they are established
This crash i’m having happens on testflight iOS but not on andriod internal build.
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### Author:  [@jared](https://community.thunkable.com/u/jared)
#### Post date: [May 22, 2022, 11:30am UTC](https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451/3 "2022-05-22T11:30:23Z")
When is it happening? Knowing this can help us narrow down what’s going on.
Reading a purchase history response can crash even the best iPhone, it’s too big!
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### Author:  [@exploriverse.com](https://community.thunkable.com/u/exploriverse.com)
#### Post date: [May 23, 2022, 3:50pm UTC](https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451/4 "2022-05-23T15:50:58Z")
It’s happening on the character select screen in onboarding once I tap on a button to choose a character. The following page is the choose pet page. Both block screenshots are attached below.
I got the crash after I had copied and pasted the IAP blocks from my test page to the page they needed to be on. I witnessed some variables not pasting correctly, acting as if the variables didn’t exist. I taped on the dropdown and the variable was not there. I had to refresh and they showed up. I don’t think this is the cause as the blocks perform fine in the Android build.
For those interested as I am to find the issue. Below are blocks I was working on that resulted to the next build experiencing crashes on iOS. Credit to @jared for verifying purchases and xano approach.
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### Author:  [@system](https://community.thunkable.com/u/system)
#### Post date: [August 21, 2022, 3:51pm UTC](https://community.thunkable.com/t/crash-logs-could-help-troubleshoot-the-app-building-progress-and-reduce-frustration-of-searching-for-a-problems-when-apps-crash/1882451/5 "2022-08-21T15:51:26Z")
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