I can't add a new subtree or link to an existing subtree.

The repositories are on Bitbucket (sorry I can't put a link to them, they're private. If it's necessary I can create fake repos).

If I try to add a new subtree on a non-existing folder, Sourcetree asks for my password, I enter it, and later I get these errors:

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git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree subtree add -P /Users/sergidiaz/Desarrollo/XXX-for-android/jni/Test https://sergidiaz@bitbucket.org/YYY/XXX-for-ios.git master

2013-12-13 13:02:29.146 git-credential-sourcetree[8201:707] Error (internetKeychainItemForServer:withUsername:path:port:protocol - The specified item could not be found in the keychain.

From https://bitbucket.org/YYY/XXX-for-ios

• branch master -> FETCH_HEAD

error: Invalid path '/Users/sergidiaz/Desarrollo/XXX-for-android/jni/Test/.gitignore'

error: Invalid path '/Users/sergidiaz/Desarrollo/XXX-for-android/jni/Test/.gitmodules'

error: Invalid path '/Users/sergidiaz/Desarrollo/XXX-for-android/jni/Test/3D Assets/Balon.FBX'

error: Invalid path '/Users/sergidiaz/Desarrollo/XXX-for-android/jni/Test/3D Assets/CAMP.mesh'

(More Invalid path errors, one for each file...)

error: pathspec 'jni/Test' did not match any file(s) known to git.

Completed with errors, see above

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If I create the folder I simply get a "prefix already exists" error.

If I create a subtree using the command line, following this guide from your own blog (http://blogs.atlassian.com/2013/05/alternatives-to-git-submodule-git-subtree/) and then I try to link to it, I get the same "prefix already exists" error.