Can't use audiowrite on linux server - stops with the Error invalidFileExtension

I'm executing this Code:

filename = ['EHG_HRIR_in.wav'];
disp(filename);
audiowrite(filename, combined_signal(:,side), Fs);

And the error message Matlab is throwing:

Error using message

In 'MATLAB:audiovideo:audiowrite:invalidFileExtension', parameter {1} must be a real scalar.

Error in audiowrite>validateExtension (line 379)

error(message('MATLAB:audiovideo:audiowrite:invalidFileExtension',...

Error in audiowrite>validateFilename (line 394)

validateExtension(filepath.Extension,filename)

Error in audiowrite (line 165)

[props.filename, fileExisted] = validateFilename( props.filename );

I'm very happy, if anyone could tell me what is going on.

Answer 1

[Andrej Voss]

The error message is wrong:

'MATLAB:audiovideo:audiowrite:invalidFileExtension', parameter {1} must be a real scalar.

The function get.WriteableFileTypes in PluginManager.m returns an empty array which indicates a missing C++ library.

@MathWorks Support Team An appropriate error message like "no writable file type found, check system's C++ sound libraries" would help a lot.

I'm not an expert but I could solve the problem by installing the necessary libraries e.g. by installing the Synthesis ToolKit in C++ (STK)

sudo apt-get install stk

'clear all' the console

Now it should work.