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Editorial Team
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Asked: 2026-06-02T13:00:36+00:00

I’m trying to convert my application to Automatic Reference Counting but when Xcode generates

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I’m trying to convert my application to Automatic Reference Counting but when Xcode generates the preview I get this error:

/Users/alessandro/Library/Developer/Xcode/DerivedData/CroMAR-gwraklradkfapbguekcdgjignatm/Build/PrecompiledHeaders/CroMAR-Prefix-dlennltvfqdqsxbbvypkwlbqyvtn/CroMAR-Prefix.pch' file not found

I tried to clean the project, close Xcode, delete the derived data, add the .pch file to that directory but the error is still there and I cannot migrate to ARC.
Any ideas?

Thanks
Ale

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1 Answer

  1. Editorial Team

    Hi solved the problem in that way. I noticed that the aforementioned problem was linked to the kind of problem reported in this discussion Convert to ARC – LLVM compiler 3.0 Error thereby to solve the problem is to select the iOS simulator as target during the migration to ARC.

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