Your project contains error(s), please fix it before running it

Question

I am developing a simple Android application. But when I run Eclipse, it shows the following error:

Your project contains error(s), please fix it befo

Answer 1

Recently I came across this error. I was really in a corner with no help, then I figured it out. This error can occur for the following reasons:

• An error in the project code
• Improper linking of external library files to the project
• Most important: if your debug.keystore file is expired.

The first 2 cases are easily identifiable but the third one is like searching a black box in a dark room.

So in addition to Project -> Clean, remove your debug.keystore file also.

I am using Mac + Eclipse so to remove, I wrote the command rm ~/.android/.debug.keystore in a terminal.