Eclipse Unable to install breakpoint

Question

So a couple weeks ago my Eclipse IDE no longer allowed me to remotely debug my application saying that it was unable to install breakpoints because line numbers were not be

Answer 1

In order to re enable the message : Preferences => java => debug . it is at the bottom of the screen : "Warn when unable to install breakpoint du to missing line number attributes"

For the problem about installing breakpoints, try to add a -g to your javac command line in ant (debug attribute of you compilation task, http://ant.apache.org/manual/Tasks/javac.html)

Eventually check if you have not mapped your project on a JRE instead of a JDK in eclipse.