Hi,
I'm looking at the documentation and then the code for stopVirtualMachine. The forced parameter is passed down into the VM manager, where it seems to be ignored. This means that cleanupEvenIfFailed during VM stop will always be false, despite what the API command says. Going back to commit a4f4c986 in 2013, we can see that the forced parameter was used. During subsequent refactoring, this seems to have vanished.