[9fans] how to continue running mk target body after command failure?

[EBo]

I am setting up some regression testing where I expect the command to 
fail (actually that is what I am testing).  How do you force mk to 
ignore the return status of a command it is running and continue running 
the target body?

As a note, I read through all the mk attributes and could see none that 
made sense or that I could get to work.

  EBo --