i dont know where i went wrong and i dont know how to fix it becouse im quite new to mit app inventor. but the problem is this
and my .aia is
QuizApp_copy (1).aia (3.9 MB)
and my .aia is
QuizApp_copy (1).aia (3.9 MB)
Android or iOS?
ios
On which screen does the error occur?
i made it on my pc and conected as a copanion on my ios
You have what, 5 Screens?
Which one gets the error?
You might try turning off all music before switching Screens.
Also turn off all Clock Timers before switching Screens.
i mean even tho i am a long time user,not to the community tho), it looks complex to me
@zrifk The problem is that there are many concatenated Arrangements -originally invisible - vying for space and defined with percentage height. I estimate that if the sum of these percentages were 100% such an error would not happen... but if you add all these percentages the total gives 199%... something difficult to manage.
The way the app was built some percentage possibilities could coexist below 100% as its visibility is controlled... but to compile the *.apk is not made an analysis of the programmed visibility flow... and the compiler It decides that it will not be possible for them to coexist.
In a modest attempt, I modified the height of a few Arrangements in the screen StartQuiz, without analyzing all the flow of visibility... and changed percentage values to fixed values.
The error has disappeared and the *.apk is gently compiled on Android.
Try importing this *.aia and see if it works well in iOS 
QuizApp_copy2.aia (3.9 MB)
Lito
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@zrifk Look at this feature to know how to properly assign the fixed height for each Arrangement, without using percentage values »
Lito
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