using existing task in own task

[Jens Kumpfm�ller]

hi,

i tried to use the Jar task in my own task:

Jar jarTask;
jarTask = (Jar)project.createTask("Jar");
jarTask.setBasedir(new File(basedir));


but i always get a NUllPointerException at the third line. 

so what's wrong with it?

thx 

jens