Android CLI build shows invalid resource directory name error: MY_PROJECT\res/crunch

Question

I'm building my PhoneGap Android app using the Node.js command line interface, with the command phonegap run android. It shows this error:

-code-gen: 
[mergemanifest] Found Deleted Target File
[mergemanifest] Merging AndroidManifest files into one. 
[mergemanifest] Manifest merger disabled. Using project manifest only.
     [echo] Handling aidl files...
     [aidl] No AIDL files to compile.
     [echo] ----------
     [echo] Handling RenderScript files...
     [echo] ----------
     [echo] Handling Resources...
     [aapt] Generating resource IDs...
     [aapt] invalid resource directory name: C:\Users\brian.lee\Desktop\Eclipse
Workspace\facebook_trial\plugins\com.phonegap.plugins.facebookconnect\src\android\facebook\FacebookLib\res/crunch    
BUILD FAILED

I first assumed that it was just looking for a missing folder, so I created a crunch folder under MY_PROJECT/res, to no avail. I also tried using Eclipse to perform a Project->Clean, to no avail.

How do I fix this error? Why is it happening? Also, why is it showing opposing slashes in .\res/crunch? Does that matter?

EDIT:

Eclipse Luna has been showing this error now, as well:

[2014-05-21 11:15:37 - Facebook_Trial] invalid resource directory name: C:\Users\brian.lee\Desktop\Eclipse Workspace\facebook_trial\plugins\com.phonegap.plugins.facebookconnect\src\android\facebook\FacebookLib\res/crunch

Answer 1

Close Eclipse and then run ant clean in your project folder.