quaternion supervisor

Hi,

I am using a MPU9250 and developping on a Cortex M0.
I set up a Eclipse project with gcc.
When I run the "inv_execute_on_data" function, I get a error.
At the line" result = inv_data_builder.process[kk].func(&sensors);", I get this message " can't find a source file at "../mpl/quaternion_supervisor.c", Locate the file or edit the source lookup path to include its location".

The library is in the mpl folder. The path is right.

Is it a location file issue or a library issue?

Thanks in advance.