Unable to open executable - xcode

Question

I'm getting this error...any idea how to solve it?

GenerateDSYMFile /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app.dSYM /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest
    cd /Users/fmota/Documents/Developer/Protobuf/PBTest
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/usr/bin/dsymutil /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest -o /Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app.dSYM

error: unable to open executable '/Users/fmota/Library/Developer/Xcode/DerivedData/PBTest-gvudadeakgzklbekugyiqyfyprlt/Build/Products/Debug-iphonesimulator/PBTest.app/PBTest'

Solution 1

I have also faced that problem. I have closed, restarted Xcode; deleted the application from device and reinstalled it again, then the problem has gone.
Make sure the library and project files is truly included if it is not include it shows in red color in this type of case some time it is in original folder and not in project so delete it and add it again.

Solution 2

In my case I had accidentally #imported the implementation file of a class instead of the header file (#import "MyClass.m" instead of #import "MyClass.h"). Unfortunately the error message for this innocent mistake is the opposite of helpful.

Solution 3

I might be a lil' late to this party, but same problem, solved it by going to Product > Scheme > Manage Schemes... Then simply delete current scheme and recreate a new one then try building again.

This is a good way of resetting any compilation settings you might have inadvertently changed.

Solution 4

In my case, I was trying to compile external library into my code and some of test c files in this library was added on "Compile Sources" on "Build Phases" tab. These files also had main() function which was causing it show "duplicate symbol" message. Once I removed these files from Compile Sources, project compiled successfully.

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Comments

[EHarpham]

Lifesaved this worked for me. I was transferring an xcode 5 ios 7.1 file to xcode 6 when i started seeing problem