Quit process that takes too long


I made command that works in the loop - finds and unrolls the largest surface within each polysurface, but the command sometimes hangs ( rhino becomes non-responsive ) during the process.

I can “catch” the error when unroll method fails but how to catch it when it hangs
Idea is to give it ~10 sec time to do it and terminate it if it does not finish (success or fail) in that period, and go to the next polysurface
At the moment I work in python but I plan to move to VB Rhinocommon anythow so any idea/solution is welcome

Thanks in advance


if you’re sure that your script is stuck in the loop and not a rhino command, you may use something like below. You can still cancel with ESC or define a duration when the script exits the loop.

import time
import scriptcontext
import rhinoscriptsyntax as rs
def DoSomethingForSomeTime():
    start_time = time.time()
    duration = 5 #seconds
    counter = 0
    while True:
        if scriptcontext.escape_test(False):
            print "Canceled with ESC"
        elapsed_time = time.time() - start_time
        if elapsed_time >= duration:
            print "Canceled after {} seconds".format(elapsed_time)
        counter += 1

Note that i added rs.Prompt(str(counter)) just so you can see the loop is still running. If you remove this and the counter the time measured is more accurate.


Hello Clement,

It is actually a rhino command that virtually hangs the loop.

when I have some “complex” parts (solids), Rhino seems to hangs while trying to perform scripted “squish” or while trying to calculate volume or center of gravity for this parts…

I prefer to detect such parts, re-model them in order to make them it more simple, and then re-run the script…