using existng task in own task

[noname23]

hi,

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

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

but the last line throughs a NullPointerException at runtime (while using
the task out of ant)

what's wrong with that?

thx jens