Dear Sir/Madam
It seems there is an error in the MATLAB code. This error might not necessarily show up when executing the same command (as in the C# code) in MATLAB, because it may be related to one or more variables not being passed correctly. If you send me the MATLAB code you created the .NET library from, I can attach MATLAB to Visual Studio and see where the error occurs in the MATLAB code, when executing "MWArray[] a = asd.lte_fdd_dl_transmit(15, 8, 1, 20, 2, 30, 400, 9, 4, 15);" in C#.
Best Regards
Alex