file has been modified since the precompiled header was built

E

13

44

So I accidentally modified a header (CBCentralManager.h) and caused the above error to show when I build. I searched stack overflow for the solution, and found this. Even after deleting the derived data, I still get the same error. I've also tried to delete the ModuleCache/FUW5IOHP9BIS folder with no success.

Here is the specific error I'm seeing:

file /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManager.h' has been modified since the precompiled header '/var/folders/pj/hslm53_51xxd_npfqym5r6z00000gn/C/com.apple.DeveloperTools/5.0-5A1412/Xcode/5.0-5A1412/Xcode/ModuleCache/FUW5IOHP9BIS/CoreBluetooth.pcm was built

Any help is greatly appreciated.

Evanston answered 15/10, 2013 at 21:51 Comment(4)

have you tried clean and rebuild from xcode's menu? – Inquietude 15/10, 2013 at 22:6

Yes, I've tried everything in the link in the question. It doesn't make sense that clearing the derived data does not fix this problem. – Evanston 16/10, 2013 at 14:26

Possible duplicate of #14793829 – Katzenjammer 23/1, 2014 at 17:12

Try this... https://mcmap.net/q/275366/-fixing-file-39-project-pch-39-has-been-modified-since-the-precompiled-header-was-built-error-in-xcode Worked fine for me. – Rostov 15/9, 2014 at 8:5

I

49

Deleting ~/Library/Developer/Xcode and restarting Xcode fixed this for me (Xcode 6 B7). Suspect an aggressive caching bug. Warning! This deletes archives from all your projects.

No amount of cleaning / build folder cleaning / derived data deleting helped before that.

Islet answered 4/9, 2014 at 11:30 Comment(4)

I'll switch your answer to the correct one (since I can no longer reproduce the issue, and several people verified that your solution works). – Evanston 19/9, 2014 at 3:33

CAREFUL! This will also wipe out all your archives from all your projects! – Githens 19/9, 2014 at 12:49

Instead try deleting /Xcode/DerivedData/ModuleCache. That solves the purpose. – Misdirection 24/9, 2014 at 13:8

please, could you explain to me what implicates, in practice, the warning? – Ungrudging 19/12, 2021 at 12:30

C

90

I faced this issue on OS10.10 with Xcode 6. I resolved issue by removing .pcm files.

To delete press 'shift+command+g' & delete all .pcm files or goto the folder ~/Library/Developer/Xcode/DerivedData/ModuleCache/ & delete all .pcm files.

Perform deep clean by pressing 'shift+alt+command+k.

Hope it will work for you.

Chukchi answered 7/8, 2014 at 12:44 Comment(8)

Thank you for explaining where they are and the environment you were in. – Throw 18/9, 2014 at 18:36

Deleting the whole ModuleCache folder worked for me with Xcode6 – Lexicology 18/9, 2014 at 20:59

OSX 10.10.2/Xcode 6.2. 1) There are no .pcm files listed anywhere in my project. 2) Pressing shift+command+g in Xcode does nothing except make a bonk! sound. 3) There are no .pcm files in the directory ~/Library/Developer/Xcode/DerivedData/ModuleCache/ – Nashville 17/4, 2015 at 4:43

None of my old projects will build, and a new project won't build either. Wow, Xcode6 is a super IDE! – Nashville 18/4, 2015 at 17:6

@Nashville I have not started using XCode6.2.x. Might be possible that Apple made some changes in Xcode IDE. – Chukchi 7/5, 2015 at 12:13

What worked for me was doing what @Chinch suggested: ~/Library/Developer/Xcode$ rm -rf DerivedData. – Nashville 7/5, 2015 at 16:45

Cool，it is good way to clean pem files. Awesome. Thanks – Commendatory 27/12, 2021 at 10:59

Deleting ModuleCache also worked in 2023 with Xcode 14.3 🎉 – Fraternal 25/4, 2023 at 1:30

I

49

Deleting ~/Library/Developer/Xcode and restarting Xcode fixed this for me (Xcode 6 B7). Suspect an aggressive caching bug. Warning! This deletes archives from all your projects.

No amount of cleaning / build folder cleaning / derived data deleting helped before that.

Islet answered 4/9, 2014 at 11:30 Comment(4)

I'll switch your answer to the correct one (since I can no longer reproduce the issue, and several people verified that your solution works). – Evanston 19/9, 2014 at 3:33

CAREFUL! This will also wipe out all your archives from all your projects! – Githens 19/9, 2014 at 12:49

Instead try deleting /Xcode/DerivedData/ModuleCache. That solves the purpose. – Misdirection 24/9, 2014 at 13:8

please, could you explain to me what implicates, in practice, the warning? – Ungrudging 19/12, 2021 at 12:30

R

24

Remove the pcm file

rm "/var/folders/pj/hslm53_51xxd_npfqym5r6z00000gn/C/com.apple.DeveloperTools/5.0-5A1412/Xcode/5.0-5A1412/Xcode/ModuleCache/FUW5IOHP9BIS/CoreBluetooth.pcm"

then

Clean Project( Cmd+Shift+K)

Problem solved

Ruth answered 13/1, 2014 at 8:51 Comment(4)

I've tried deleting the whole ModuleCache folder with no success (see question). Unless you're implying that deleting just the CoreBluetooth.pcm will fix the problem. – Evanston 14/1, 2014 at 15:23

for my case, i just need to delete pcm file then clean and it worked :) – Ruth 15/1, 2014 at 9:31

@Mark: ya, i meant so, because in the most of my cases i always try like this first. :D – Ruth 15/2, 2014 at 8:4

the solution for me with my Jenkins build was to add rm -Rf $TMPDIR../C/com.apple.DeveloperTools/*/Xcode/*/Xcode/SharedPrecompileHeaders/ – Group 2/10, 2014 at 6:21

G

5

Just select clean from the project menu. That should force a complete rebuild and solve the rproblem.

Geaghan answered 16/10, 2013 at 23:48 Comment(3)

This is the first thing I tried. Clean did not fix the issue, nor did build folder clean. Neither did deleting the derived data folder. – Evanston 21/10, 2013 at 20:26

@Mark, sounds like an Xcode bug. I would suggest submitting an Apple Radar bug. – Geaghan 9/1, 2014 at 13:9

Will do. I'll link the radar bug in the original question once I've submitted it. – Evanston 9/1, 2014 at 13:32

G

4

Try going to your Organizer -> Projects, and you'll see the path for where you're derived data is saved. Mine looks something like "~/Library/Developer/Xcode/DerivedData/[Project name]-[mumbo jump]"

Delete the "[Project name]-[mumbo jump]" folder, and you should be all good.

Goodish answered 16/10, 2013 at 17:40 Comment(2)

This is what the link in my question suggested, and it is the first thing I tried. It does not fix my issue, as the error is thrown again. – Evanston 16/10, 2013 at 18:21

The important part for me was to find where my derived data is and cleaning that, rather than assuming it's in ~/Library/. Mine is at ~/Developer/Xcode/DerivedData so I cleaned that and the ModuleCache and that fixed it – Fefeal 13/8, 2015 at 0:23

S

4

Deep clean (Cmd + Opt + Shft + K), clearing folder DerivedData, clearing simulator, restarting Xcode and mac doesn't work for me.

Problem was fixed only after changing pch-file (adding a whitespace or comment/uncomment some code). File was incorrectly cached on build phase by Xcode. Changing this file fixed problem.

Suckling answered 14/8, 2014 at 9:50 Comment(0)

C

4

Manually deleting the DerivedData folder fixed it for me.

Chinch answered 22/9, 2014 at 13:4 Comment(1)

Yes, this worked for me too. Thanks! $ cd ~/Library/Developer/Xcode/ then ~/Library/Developer/Xcode$ rm -rf DerivedData. – Nashville 17/4, 2015 at 4:46

E

2

So it seems the only way to fix this issue is to uninstall Xcode and download it again. This fixed my problem.

Evanston answered 16/10, 2013 at 18:22 Comment(4)

I agree it's very strange. There's probably something going on that we've missed. An uninstall just happens to reset it. – Evanston 18/12, 2013 at 20:28

Slightly less extreme - deleting ~/Library/Developer/Xcode worked in my case (no amount of cleaning did). – Islet 4/9, 2014 at 11:29

Good to know there's alternatives to uninstalling Xcode. – Evanston 4/9, 2014 at 12:39

Better yet, delete just ~/Library/Developer/Xcode/ModuleCache. That way you don't lose all the other data. – Crystallization 18/9, 2014 at 13:20

S

2

quit xcode and reopen it .This fixed my problem.

Soapbark answered 31/10, 2013 at 12:45 Comment(0)

A

1

I was facing this issue. Deleting moduleCache and restarting Xcode & Mac did not help me to resolve the issue.

Solution that worked for me: I copied the path "/private/var/folders/5s/1q3qz48j6zxc028txvdyqhwr000btt/C/org.llvm.clang/ModuleCache" in Finder->Go to folder, deleted all the folders from that ModuleCache.

Now I am able to build successfully.

Ake answered 27/4, 2016 at 6:17 Comment(0)

C

0

You can also try these, clean and then build again

find /var/folders 2>&1 | grep -v 'Permission denied' | grep '\.pcm' | xargs rm
find ~/Library/Developer/Xcode/DerivedData 2>&1 | grep -v 'Permission denied' | grep '\.pcm' | xargs rm

Concord answered 25/11, 2014 at 9:14 Comment(0)

B

0

Nothing above works for me, even uninstalling Xcode. Finally, I tried copying the modified file from other project to my current project, this worked.

Bourse answered 14/1, 2016 at 15:55 Comment(0)

A

0

I tried deleting the precompiled ~/Library/Developer/Xcode and restarting Xcode, plus a few of the other ideas presented here, nothing was working. As it seems to be a multiple-target kind of issue, I found after changing the target to another target, building/uploading the other target successfully, then changing back (after doing the other things) to the target I was looking to build / upload originally, I was finally successful.

Apothecary answered 8/2, 2017 at 3:25 Comment(0)

Recommended topics

Hot tags