Discussions - or-tools-discuss

	JAVA: CBC MIP solver suddenly stops/hangs or is incredibly slow
	Hi all, I use the or-tools for solving a MIP problem with 12 rows and 80k columns. When I solve it with the CBC binary it takes around 30s. If I run it with the or-tools i don't get a result. not even after 20min. I don't get any error or something else. It just hangs. I get following output:... more » By Fabio - May 22 - 1 new of 1 message

	Problems launching java example
	Hello, I am trying to launch the "RabbitsPheasants,java" example on my eclipse. I downloaded the "Google.OrTools.java.Windows32 .2322.zip" file and used the jars to compile the code and the java.library.path option to load the jniconstraintsolver.dll library but i have the error: "jniconstraintsolver.dll: Can't find dependent libraries"... more » By tonecho - May 16 - 1 new of 1 message

Difficulties with COM interop

I have been working on a project using a combination of C# and Excel that uses Google OR Tools.I am using VBA to feed information from an Excel spreadsheet into a representation of my problem data using C#. By capturing an internal representation of the problem in C#, it's easy to swap out solvers and data sources. For now, Excel is serving as a front-end that... more »

By Steve Tyber - Apr 27 - 1 new of 1 message

	Job Shop with resource calendars
	Hello,Your library is excellent very good job .... I'm not fluent in english as I'm not a good writer in my natural language (Francais) so I copy/paste my need ;) Is there a way in or-tools to take into account or modeling calendar resources ? Are tasks breakables ? House building with resource calendars... more » By Nicolas vautrin - Apr 26 - 1 new of 1 message

	Subclassed IntVarLocalSearchOperator() in Python ?
	Hello folks, yes, another question if I may: I have written a specialized LSO for my problem derived from IntVarLocalSearchOperator. However, it seems that the overloaded methods of MakeNextNeighbor is not called. The optimizer will happily find NextNeighbors() for teh IntVars (verified using gdb) but my overloaded... more » By Dirk Schroetter - Apr 22 - 2 new of 2 messages

	How to use Or-Tools in C++ project
	I want to use Or-Tools in C++ project at windows platform, but how to build it and reference in my project. The project is very simple. By janason - Apr 18 - 3 new of 3 messages

	Update about the documentation
	Hello, The sub-section 14.11.2 that details the auxiliary graph is now available. With the sections 9.4 and 9.5 you should be able to get a pretty good idea of how the Routing Library's model works. [link]... more » By Nikolaj - Apr 17 - 1 new of 1 message

	Python version of network_routing ... Python Equivalents of "NewPermanentCallback" and BaseLNS
	Folks, trying to adapt the network_routing C++ example into a Python version. As I understand, the Python bindings do not use the 'BaseLNS' class but rather a specialized LNS inherits from a pure Python (object) [gleaned from steel_lns.py]. In order to build the DecisionBuilders in the network_routing example uses... more » By Dirk Schroetter - Apr 17 - 4 new of 4 messages

	LIsting all constraints added
	Hi, I would like to list all the constraints added to a given solver, I tried solver.constraint() but it seems to return the number of constraints. Thanks By Rogerio Atem de Carvalho - Apr 17 - 2 new of 2 messages

	cp_trace_search flag in Python binding
	Folks, just a quick Q as I am debugging my model: Is there a specific reason for the cp_trace_search option not being supported in the Python binding ? Best Regards, /Dirk By Dirk Schroetter - Apr 12 - 6 new of 6 messages

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