case /home/cobbe/teaching/Squadron/TestInteract/case1.xml: okay!
case /home/cobbe/teaching/Squadron/TestInteract/case2.xml: okay!
case /home/cobbe/teaching/Squadron/TestInteract/case3.xml: okay!
case /home/cobbe/teaching/Squadron/TestInteract/case4.xml: okay!
case /home/cobbe/teaching/Squadron/TestInteract/case5.xml: okay!