Export composition export…nothing ! – MUTOOLS Forum

MuLab runs under win10/64.

I tried the “Export Composition As Audio File” function and here’s what it gives (see pic).
When I launch this function, the “time line” scrolls as it was the case with the 8 but although I indicate the place where the piece ends, where the 8 stopped (at the end of the piece therefore ), the 9 continues to play indefinitely and the wav file gives what appears on the screenshot.
That is to say nothing, an empty file (44 Kb each time).