CODEWITHSUNDEEP
or-tools
Jeff Saltfist
Jeff Saltfist

Reputation: 943

Google Ortools - trouble with routing example

I am having an odd issue with Google Ortools vehicle routing example, found here:

https://developers.google.com/optimization/routing/tsp/vehicle_routing

Using Windows 10, and Python 3.6...

When executing the full program code provided in the link above, the program freezes up and exits. Command line provides the following:

WARNING: Logging before InitGoogleLogging() is written to STDERR
F0502 21:33:22.115679  7972 search.cc:2658] Check failed: step > 0 (0 vs. 0)
*** Check failure stack trace: ***

I have honed the code causing the freeze down to this line of code:

assignment = routing.SolveWithParameters(search_parameters)

I am certain I have the library properly installed because other examples of the program have run successfully. I attempted to use Visual Studio, and even went so far as to disable my second GPU.

I am wondering if anyone has encountered this issue and possibly knows how to fix. Thank You.

Upvotes: 0

Views: 1109

Answers (1)

Jeff Saltfist
Jeff Saltfist

Reputation: 943

Issue was solved as follows:

Original model on google's website creates the following variable:

search_parameters = pywrapcp.DefaultRoutingSearchParameters()

I had changed to:

search_parameters = pywrapcp.RoutingModel.DefaultModelParameters()

But the required change should be:

search_parameters = pywrapcp.RoutingModel.DefaultSearchParameters()

Upvotes: 1

Related Questions