"Duplicate output file"/"Unable to build node" for localized folders

Developer Tools & Services Xcode
JetForMe OP
Created Aug ’17
Replies 12
Boosts 0
Views 17k
Participants 12

We have some HTML content embedded in our app. These live in two top-level folders. These folders have been localized, and so live in 

Resources/en.lproj/HelpContent
and 
Resources/fr.lproj/HelpContent
(for example). Similarly, we have a bunch of localized .storyboard files.


Xcode 8 builds this just fine. Xcode 9b6 complains:


duplicate output file
'/Users/me/Library/Developer/Xcode/DerivedData/MyApp-
fdskkibuvbsubudkmqtgsjxmyqme/Build/Products/Debug-iphoneos/MyApp.app/
HelpContent' on task: CpResource
/Users/me/Projects/Clients/MyCompany/repo/mp_vision/iOS/Controller/MyApp
/Resources/fr.lproj/HelpContent
/Users/me/Library/Developer/Xcode/DerivedData/MyApp-
fdskkibuvbsubudkmqtgsjxmyqme/Build/Products/Debug-iphoneos/MyApp.app/
HelpContent (in target 'MyApp')



unable to build node:
'/Users/me/Library/Developer/Xcode/DerivedData/MyApp-
fdskkibuvbsubudkmqtgsjxmyqme/Build/Products/Debug-iphoneos/MyApp.app/
HelpContent' (node is produced by multiple commands; e.g.,
'b1132708c20f997e752faabcee01d49c82a500833121dcd848c3954357d9f7b1:
CpResource
/Users/me/Projects/Clients/MyCompany/repo/mp_vision/iOS/Controller/MyApp
/Resources/en.lproj/HelpContent
/Users/me/Library/Developer/Xcode/DerivedData/MyApp-
fdskkibuvbsubudkmqtgsjxmyqme/Build/Products/Debug-iphoneos/MyApp.app/
HelpContent' and
'b1132708c20f997e752faabcee01d49c82a500833121dcd848c3954357d9f7b1:
CpResource
/Users/me/Projects/Clients/MyCompany/repo/mp_vision/iOS/Controller/MyApp
/Resources/fr.lproj/HelpContent
/Users/me/Library/Developer/Xcode/DerivedData/MyApp-
fdskkibuvbsubudkmqtgsjxmyqme/Build/Products/Debug-iphoneos/MyApp.app/
HelpContent')


The Files & Groups list shows it correctly (e.g. "HelpContent" with "HelpContent (English)" and "HelpContent (French)" as sub-folders. The folders only show up once in the Copy Bundle Resources phase.


But the build stops almost immediately on this error.

Replies  12
Boosts  0
Views  17k
Participants  12
IngmarStein OP
Sep ’17

Were you able to find a solution to this? I have exactly the same issue when using the new build system (i.e. a localized HTML file that is copied into the Resources directory).

0
Claude31 OP
Sep ’17

Did you try a clean build folder (option clean) ?

0
IngmarStein OP
Sep ’17

Yes.

Clean build folder is the only clean option for the new build system. I even tried deleting the whole DerivedData folder.

0
pstoppani OP
Sep ’17

Same problem with some PDF files.


It looks like the resource is being copied directly to the root folder instead of the <lang>.lproj subfolder.


Any solutions?

0
holger OP
Sep ’17

Same problem for me. Does anyone have a solution?

0
OP
Apple
Sep ’17

Sorry about that.


This is a known issue with some projects when using the new build system. For now, you should resolve this by switching back to the old build settings in your Project/Workspace Settings. We will note in the release notes when this problem has been resolved.


- Daniel

0
desygner OP
Oct ’17

So for those watching there is now an Xcode 9.1 beta 2 which, according to the release notes, has the issue resolved

0
fabfer OP
Dec ’17

I actually have the same problem with Xcode 9.2.

Is the problem still unresolved?

0
RandyHill OP
Dec ’17

I just ran into same problem as well trying to use new build system in 9.2. I've got 3 warnings


One warning "cannot link framework foundation.framework."

Two warnings for "duplicate output file" for a .plist and a .strings

Two errors: "unable to build node" for the same .plist and .strings files, both saying "[node is produced by multiple commands]".


I checked build phases and there aren't any duplicate files. But there are three .strings files with the same name, obviously in different paths.


The plist files don't have the same name, but there are two that have names ending in "info.plist".


Builds like a champ in old build system.

0
Apps4LifeLLC OP
Dec ’18

One commong cause for this issue is having multiple files in your resources folder that have the same name. In big projects with many nested folders it is quite easy for this to occur. Double check any recent images you have added for example. The build warnings should also indicate a file name somewhere in them as a helpful hint.

3
juandrizly OP
Sep ’19

This fixed it for me on Xcode 11.0 beta 6.

0
yanrrr OP
Jan ’22

I am experiencing similar issue with xcode 12.4. I am working with a large project with many "version.h" files for example that I am not at liberty to change the names. The project was cleaned before building. What can I do to get it to work? Thank you.

Build system information error: Multiple commands produce '/Users/..../build/Distribution-iphonesimulator/usr/local/include/Version.h':

Target 'vncviewersdk' (project 'vncviewersdk') has copy command from '/Users/..../common/libs/plat/Version.h' to '/Users/..../build/Distribution-iphonesimulator/usr/local/include/Version.h'Target 'vncviewersdk' (project 'vncviewersdk') has copy command from '/Users/..../native/common/Version.h' to '/Users/.../build/Distribution-iphonesimulator/usr/local/include/Version.h'
0
"Duplicate output file"/"Unable to build node" for localized folders
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