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Home/ Questions/Q 8760475
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Editorial Team
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Editorial Team
Asked: June 13, 20262026-06-13T15:03:13+00:00 2026-06-13T15:03:13+00:00

My app is working very fine on iPhone and Simulator with iOS 6, but

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My app is working very fine on iPhone and Simulator with iOS 6, but when i try to run on iPhone/Simulator with iOS 5 the app crashes

The error is:

Terminating app due to uncaught exception ‘NSInvalidUnarchiveOperationException’, reason: ‘Could not instantiate class named NSLayoutConstraint’

I’m not using Autolayout on Interface Builder Document.

Could anyone help me?

Autolayout is not checked

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  1. Editorial Team
    Editorial Team
    2026-06-13T15:03:14+00:00Added an answer on June 13, 2026 at 3:03 pm

    make sure you have unselected use autolayout in interfacebuild

    enter image description here

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