Error in CPLEX integration in .NET

[AM]

Hi

When I add the following lines to include CPLEX, I can't even run CBC which is very strange:

>tools\make clean_third_party

>tools\make clean

> Change line 127 in Makefile.win.mk to:   STATIC_CPLEX_LNK = "$(WINDOWS_CPLEX_DIR)\\lib\x64_windows_vs2017\stat_mda\cplex1290.lib"

>tools\make third_party

> add WINDOWS_CPLEX_DIR=C:\Program Files\IBM\ILOG\CPLEX_Studio129\cplex to Makefile.local

>tools\make dotnet

>tools\make run SOURCE=examples/dotnet/csintegerprogramming.cs

"C:\Program Files\dotnet\dotnet.EXE" build examples\\dotnet\\csintegerprogramming.csproj

Microsoft (R) Build Engine version 16.4.0+e901037fe for .NET Core

Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 539.1 ms for C:\or-tools\examples\dotnet\csintegerprogramming.csproj.

  csintegerprogramming -> C:\or-tools\examples\dotnet\bin\x64\Debug\netcoreapp2.1\Google.OrTools.csintegerprogramming.dll

Build succeeded.

    0 Warning(s)

    0 Error(s)

Time Elapsed 00:00:01.45

"C:\Program Files\dotnet\dotnet.EXE" run --no-build  --project examples\\dotnet\\csintegerprogramming.csproj

---- Integer programming example with GLPK ----

Could not create solver GLPK_MIXED_INTEGER_PROGRAMMING

---- Linear programming example with CBC ----

Unhandled Exception: System.TypeInitializationException: The type initializer for 'Google.OrTools.LinearSolver.operations_research_linear_solverPINVOKE' threw an exception. ---> System.TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'google-ortools-native' or one of its dependencies: The specified module could not be found. (Exception from HRESULT: 0x8007007E)

   at Google.OrTools.LinearSolver.operations_research_linear_solverPINVOKE.SWIGExceptionHelper.SWIGRegisterExceptionCallbacks_operations_research_linear_solver(ExceptionDelegate applicationDelegate, ExceptionDelegate arithmeticDelegate, ExceptionDelegate divideByZeroDelegate, ExceptionDelegate indexOutOfRangeDelegate, ExceptionDelegate invalidCastDelegate, ExceptionDelegate invalidOperationDelegate, ExceptionDelegate ioDelegate, ExceptionDelegate nullReferenceDelegate, ExceptionDelegate outOfMemoryDelegate, ExceptionDelegate overflowDelegate, ExceptionDelegate systemExceptionDelegate)

   at Google.OrTools.LinearSolver.operations_research_linear_solverPINVOKE.SWIGExceptionHelper..cctor()

   --- End of inner exception stack trace ---

   at Google.OrTools.LinearSolver.operations_research_linear_solverPINVOKE.SWIGExceptionHelper..ctor()

   at Google.OrTools.LinearSolver.operations_research_linear_solverPINVOKE..cctor()

   --- End of inner exception stack trace ---

   at Google.OrTools.LinearSolver.operations_research_linear_solverPINVOKE.new_Solver(String jarg1, Int32 jarg2)

   at Google.OrTools.LinearSolver.Solver..ctor(String name, OptimizationProblemType problem_type)

   at Google.OrTools.LinearSolver.Solver.CreateSolver(String name, String type)

   at CsIntegerProgramming.RunIntegerProgrammingExample(String solverType) in C:\or-tools\examples\dotnet\csintegerprogramming.cs:line 21

   at CsIntegerProgramming.Main() in C:\or-tools\examples\dotnet\csintegerprogramming.cs:line 111

tools\make: *** [run] Error -532462766

Any help is appreciated.

Thanks

[Laurent Perron]

From the Makefile.local:

# Define UNIX_CPLEX_DIR to use CPLEX 

and WINDOWS_CPLEX_DIR on windows.

Laurent Perron | Operations Research | lpe...@google.com | (33) 1 42 68 53 00

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[AM]

I defined WINDOWS_CPLEX_DIR in Makefile.local in Windows OS. what else should I do?

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[Laurent Perron]

Add the dll to your path

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--Laurent

[AM]

Thanks.

On Friday, December 6, 2019 at 4:14:13 PM UTC-6, Laurent Perron wrote:

Add the dll to your path

To view this discussion on the web visit https://groups.google.com/d/msgid/or-tools-discuss/97f65d6b-aafb-48c6-be55-727d84408ccb%40googlegroups.com.

--

--Laurent

[AM]

I checked,  all below directories are in my system path

C:\or-tools\ortools\dotnet\Google.OrTools\bin\x64\Release\net452

C:\or-tools\lib

C:\Program Files\IBM\ILOG\CPLEX_Studio129\cplex\bin\x64_win64

I still get the same error.

[Manuel Ruiz]

Hi Amir,

The error says that the native ortools dll is missing, could you check if it is in one of the repositories you listed ? 

May be you can also use Dependency Walker to check shared libraries dependencies.

Hope this helps

Manuel

Le jeu. 12 déc. 2019 à 10:11, AM <amir.m...@alumni.utoronto.ca> a écrit :

I checked all below directories are in my system path

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  Manuel Ruiz

[AM]

Thanks Manuel. Yes native ortools dll is there and I used dumpbin to find all dependencies and all DLLs were in place. It was working and suddenly I start getting that error.

Amir

On Thursday, December 12, 2019 at 3:20:02 AM UTC-6, Manuel Ruiz wrote:

Hi Amir,

The error says that the native ortools dll is missing, could you check if it is in one of the repositories you listed ? 

May be you can also use Dependency Walker to check shared libraries dependencies.

Hope this helps

Manuel

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  Manuel Ruiz