Unhandled Exception: System.ArgumentException: failed to convert parameters
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
  at GPUTests.MatrixMult.MatrixMultGPU (Extran.Nuda.nuimage2d`2 matrix_in_a, Extran.Nuda.nuimage2d`2 matrix_in_b, Extran.Nuda.nuimage2d`2 matrix_out, Int32 size) [0x00000] in <filename unknown>:0
  at GPUTests.MatrixMult.MatrixMultSample (Double launching_time) [0x00000] in <filename unknown>:0
  at GPUTests.MatrixMult.Main () [0x00000] in <filename unknown>:0