Originally posted by: SystemAdmin

[shadi said:]

How I can use the opl.CP.Next() method  in VB.NET (because there are two functions with the same name (next() & Next()) and because the VB.Net is not a case sensitive) I get the following error:



C:\Documents and Settings\Administrator\Desktop\OPL\Optimization\Optimization\Form1.vb(266): Overload resolution failed because no accessible 'Next' is most specific for these arguments:

    'Public Overrides Function next() As Boolean': Not most specific.

    'Public Overrides Function Next() As Boolean': Not most specific.



Kshieboun Shadi

#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: SystemAdmin

[Didier Vidal said:]

Shadi,

Thanks for reporting this issue. I have registered a bug report about this.

In the current version, the "next" API can be called from C#, but not for VB for the reason you gave.

A workaround would be to write the next iterations in OPL script, if this can work for you.


Didier.


#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: SystemAdmin

[arnaud.schulz said:]

Hi,

A workaround is to use the Reflection API.

    Function CallNext(ByVal cp As ILOG.CP.CP) As Boolean
        Dim cpType As Type = cp.GetType
        Dim meth As Reflection.MethodInfo = cpType.GetMethod("Next")
        Try
            Return meth.Invoke(cp, Nothing)
        Catch ex As System.Exception
            Throw ex.InnerException           
        End Try
    End Function

Arnaud.
#ConstraintProgramming-General
#DecisionOptimization

Originally posted by: SystemAdmin

[rdumeur said:]

Hi,

Thank you for the workaround!
This issue will be resolved in the next version of CP Optimizer.

        Cheers,

    Renaud
#ConstraintProgramming-General
#DecisionOptimization