On May 28, 2017, at 11:57 PM, Jonathan M West <[log in to unmask]> wrote:

> I am getting a null pointer exception when trying to run gridlock in Windows 10 with Eclipse. 

Unfortunately, we don't see the backtrace on that exception.  If you have access to the code, change lines 284 to 287 of Gridlock.java to:

        } // catch (Exception e)
        // {
        //    System.out.println("ERROR: issue with population file: " + e);
        // }

... recompile and re-run.  Tell us what the backtrace printed out says.

At any rate, my first guess is that the file "data/roads_points_place.csv" is missing or for some reason in the wrong place.

Sean