Rhino crashing while running Octopus 4

Hi,
I was successfully optimizing using Octopus, over many times I have used it. But suddenly from yesterday onwards whenever I was trying to run it rhino is crashing. I tried to do the Octopus again but in vain. I tried moving the Gh to another file, no chance. I reinstalled Octopus, no chance. I request if anyone had similar issues kindly advise. i am using Rhino6 with the latest LBHB. My system RAM is 16GB.
Thanks in advance.
Vijesh