Failed taskdef reporting as successful build

Hello.

I using "Anthill version 1.8.1.303" and I have a taskdef class that
cannot be found, because I deleted it.  What concerns me is the build
machine is reporting the build as a successful build, but the ant logs
clearly state the build failed.

Here is the taskdef:

  <taskdef name="zkm" classname="ZKMTask"/>

I have tried adding onerror="failall", with no difference.  If ant is
reporting "BUILD FAILED" how would that cause Anthill to assume this was
a successful build?

Subject: TestAnthill 1.3 build succeeded
-------------------------------------
c:\anthill\publishDir\TestAnthill\buildLogs\TestAnthill-1.3-build.log
BUILD FAILED
c:\Build\TestAnthill\build.xml:5: taskdef class ZKMTask cannot be found

Total time: 0 seconds


Thanks,
Kenneth