When you map a local variable to a Throw signal node, the local variable looses it's type declaration

> Create new bpmn2 process > Add local variable throwSignal as a String > Create Script Task and set throwSignal to "newsignal" > Add an Intermediate Throw Event -> Signal > Create an Input parameter mapped to throwSignal (inParam1 -> throwSignal) > Edit the event definition add a signal (AnySignal) and map it to your throwSignal variable. Suddenly the Local variable declaration loses the String type and compiler complains about "Local Variable throwSignal has no Data Type". Again remapping throwSignal to String makes the error go away.