Build error referencing build.xml and proguard file: “null returned: 1”

Question

While building my PhoneGap app (with the Facebook SDK plugin installed), I encountered this error:

BUILD FAILED C:\\adt-bundle-windows-x86_64-201305

Answer 1

For me: I had

edited my config.xml wrongly

. Try undoing your edits or placing a generic config.xml then see if she builds.