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OrderShoppingCart method error

hi

I've created a simple process which creates a shopping order, places a shopping item in it and calls the method OrderShoppingMethod.

On the last step I've got the error.

I can call OrderShoppingMethod from the ObjectBrowser with the same parameters without any errors.

I'm not sure about Save a parameter. But it doesn't work either way.

[Job]

            ComponentAssembly=HandleObjectComponent

            ComponentClass=VI.JobService.JobComponents.HandleObjectComponent

            Task=CallMethod

            Executiontype=INTERNAL

[Parameters]

            AuthenticationString=Hidden

            ConnectionProvider=VI.DB.ViSqlFactory,VI.DB

            ConnectionString=Hidden

            MethodName=OrderShoppingCart

            ObjectType=Person

            Param1=815a6842-d3e2-42c6-8667-f51db7a05ec3

            Param2=False

            ProcID=4a041e67-0fcc-4c53-a9a0-5182c9c8f54f

            Save=True

            UID_ShoppingCartOrder=815a6842-d3e2-42c6-8667-f51db7a05ec3

            WhereClause=UID_Person = '6947a444-c6b4-4329-a2dd-430e79560289'

2018-10-09 18:37:09 +03:00 - \SERVER - VI.JobService.JobComponents.HandleObjectComponent - a6b40537-bd8d-4ca5-9e01-eafa8b5c133a: Errors occurred

    Optimizing by using the existing connection.

    Error saving Test: [System.NotSupportedException] TypeConverter cannot convert from System.String.

       at VI.DB.Implementation.HandleObjectKernel._OperationCallMethod(IUnitOfWork optionalUnitOfWork)

       at VI.DB.Implementation.HandleObjectKernel._CallMethod(IEntity entity, String methodname, List`1 parms)

       at System.ComponentModel.TypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)

       at System.ComponentModel.TypeConverter.GetConvertFromException(Object value)

    Method OrderShoppingCart was called for 1 object(s) of type Person.