When I want to export my Android application from Eclipse, the export process starts normally, but after a few seconds (when the whole process should start for a minute) it fails. The following error message will appear:
Failed to export application
What all Eclipse tells me. I am using Ecliipse 4.4.1 using the Android Development Toolkit 23.0.4.1468518.
When I then right-clicked the application, select “Android Tools” and then “Export Unsigned Application Package”, it will work again, but with more detailed error messages:

As you can see, it says:
"Android Release Export" has encountered a problem.
Failed to export application
, bin/$1$1.class, , -, . , .
bin gen, , . - APK, .
, ? !