Problem: Perl script - ant

[MrFraggel]

Hi,
I have a problem.
I start a Perlscript cc_mk_label.pl in ant with the task:
<ant:exec dir="." executable="cmd" outputproperty="resultValue" resultproperty="returnValue"
<arg line="/c ${maven.build.common.basedir}/scripts/cc_mk_label.pl"/>

The Perlscript exit with an exitcode:
exit(100);

Now I want to bind the exit code in the outputproperty or the resultproperty but it doesn't work.

The exit code 100 is definitely set from the Perl script but ant doesn't take this code in hin property.
Why not ?

I would be very pleased to be helped.

thx