Apps Android app referencing another

[darun]

Hi,
I have 2 Android applications in Eclipse and want one app to refer the other. I read in another forum that this is possible by converting one to be a library and adding this library in the buildpath of the main application. Unfortunately, this did not work and i get the error "The application <appname> (<package name>) has stopped unexpectedly. Please try again" with a ForceClose button.
Is there anything that I'm missing in this procedure?
Any help is greatly appreciated.