Working with Box2D/Cocos2D in an external iOS project

I hav开发者_开发技巧e followed the instructions as per this article and have been working with Cocos2D without much issues. Recently, I tried including the Box2D headers to try some physics like so:

#import "Box2D.h"

This resulted in a lot of errors where the Box2D.h file could not include the rest of the header files:

../cocos2d-iphone-0.99.5/external/Box2d/Box2D/Box2D.h:34:0 ../cocos2d-iphone-0.99.5/external/Box2d/Box2D/Box2D.h:34:37: error: Box2D/Common/b2Settings.h: No such file or directory

That's the first error and the rest of the 23 are like that, but for the different headers in Box2D.h.

I have already added the projects/targets to the current project as per the instructions in the article, so my project currently looks like this:

Also, I have attempted to remedy this by selecting all .m files in my project and setting the file type to sourcecode.cpp.objcpp but do not think that this is the issue. I am certain that under the User Header Search Paths build setting, the folders where these headers are stored are added. If it weren't, Cocos2D wouldn't be able to compile either.

What am I doing wrong?

I don't know if this is immediately obvious to other programmers, but I fixed this by checking the Always Search User Paths setting in the target settings. Hope it helps someone else.

Another solition for me is removing blank characters from directory names. Forexample if your project folder such as

"user/prj 01" 

change it to

 "user/prj01".