I don't see anyone else with this problem so it might be my setup.

Basically, when using the porkchop selection tool, nothing happens even after waiting for minutes.

The progress label is stuck on "Computing: 2%"

For the Limited Time tool, the result is the same, but now the label says "Computing: 1%"

Is there any way for me to debug where the computation is stuck? I haven't programmed anything for ksp, but I could try compiling mechjeb with a few extra logging instructions. What do you guys recommend?

I'll also try disabling other mods, but that might be difficult due to missing parts.

EDIT:
Using the normal transfer tool I get the error: Object reference not set to an instance of an object. Related?

EDIT2:
Tried with no other mods installed. Same problem. MJ ingame says version is 2.3.0, yet I got it from the 2.4.0.0 zip file, someone forgot to change the version number?

EDIT3:
Tried on MechJeb2-2.4.0.0-341 as well. No dice.
More information:
-I'm running the 32 bit version KSP 0.25.0.542 with no mods except mechjeb
-I get into the sun sphere of influence and target another planet.
-I start the porkchop/time limited/transfer to planet tool in the maneuver planner
-I get the problems detailed above

Is there a special way of using these tools? Have to pause the game or anything like that?

FINAL EDIT (I AM STUPID):
You are supposed to run these maneuvers from WITHIN the sphere of influence of a planet, not in the sun sphere of influence. I'm closing this issue, but maybe there should be a warning, instead of saying "Computing", and a bit more explanatory warning for the "transfer to other planet" tool