Grasshopper Window Lock

Hi, I am having serious problems working with a Grasshopper definition. All of the sudden, after using a Pull Curve and an Offset on Srf components (also, this component is taking between 15 to 30 minutes, probably the origin of the problem itself), the Grasshopper window started giving some problems. I can't pan, so I have to zoom out and zoom in to move around the definition; I can't do any more connections; and I can't go back to the Rhino window to visualize or manipulate any geometry as there's some kind of lock on the Grasshopper window. I don't know if the problem is with the defintion itself, or with my Grasshopper. Has anyone else experienced something similar? Any known solutions to this problem? I'm attaching the definition so everyone can take a look at it.

Regards,

Fernando Maytorena