Xcode warning: “Multiple build commands for output

Question

I am getting an error like this:

[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/no.png

[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/d.png

[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/n.png

But I have checked Xcode and I don't see any duplicates of such files at all. As this post in the Apple Mailing Lists say, there are no duplicates.

Answer 1

In my case the issue was caused by the same name of target and folder inside a group.

Just rename conflicted file or folder to resolve the issue.

Answer 2

another version of this situation can occur when there are duplicates in the Headers build phase.

to fix this …

1. go to your project target
2. choose Build Phases
3. choose the Headers build phase
4. enter the name shown in the warning
5. notice the two (or more) items
6. find the +|- boxes in the lower left corner
7. select one of the items, and click the - button