Value cannot be null. (Parameter 's')

nonte sure what the issue is, the same files was able to probe before, but after a week, it now won’t probe, I literally made no changes to the file. i’ve tried clean, also manually deleted the folder before running a new simulation, but it still won’t probe.

the bubble message says
Value cannot be null. (Parameter 's')

don’t know why, but changing the directory for the simulation seems to fix the issue.

Update: happened, again, changing the directory didn’t work this time, seems to be some kind of error with the simulation

@eddy3d
This is the file with the error, anyone know why it doesn’t simulate properly?
e3d_error.gh (20.7 KB)

tried in both rhino 7 and rhino 8, both goes thu a long period of simulation, but gives no results.