Muse Player Python error while converting to Matlab


Hello there,

we are converting a long(ish) recording into the Matlab format (under Windows 7 x64) and are getting a python error:

> muse-player -f data.muse -M data.mat

Muse Player 1.8.4
  * Muse file(s): ['data.muse']

  * Matlab output file: data.mat

Playback Time: 1901.5s : Sending Data          Exception in thread Thread-2:
Traceback (most recent call last):
  File "D:\Jenkins\workspace\MusePlayer-Win32-1.8.x\build\muse-player\out00-PYZ.pyz\threading", line 810, in __bootstrap_inner
  File "D:\Jenkins\workspace\MusePlayer-Win32-1.8.x\build\muse-player\out00-PYZ.pyz\threading", line 763, in run
  File "D:\Jenkins\workspace\MusePlayer-Win32-1.8.x\build\muse-player\out00-PYZ.pyz\output_handler", line 73, in start
  File "D:\Jenkins\workspace\MusePlayer-Win32-1.8.x\build\muse-player\out00-PYZ.pyz\output_handler", line 35, in broadcast_message
  File "D:\Jenkins\workspace\MusePlayer-Win32-1.8.x\build\muse-player\out00-PYZ.pyz\output_handler", line 321, in receive_msg
AttributeError: 'numpy.ndarray' object has no attribute 'append'

Input Output size mismatch:
Data in: 1529450 Data out: 1080001 File: ['data.muse']

So: numpy.ndarray has no attribute ‘append’. Well, it apparently does not.
What can we do, has anybody encountered this problem? Thanks in advance!


Any chance you can post the file or send it to me privately so we can debug it?



thank you for responding so quickly.
I uploaded the file here:

Error converting muse file to all other types

Did you found a solution for this? I have the same problem


Hi! I have the same problem… I’m new using terminal.

I don’t have precisly a code. I just write in the terminal and then I wait, but I have similar error:

“File “D:\Jenkins\workspace\MusePlayer-Win32-1.8.x\build\muse-player\out00-PYZ.pyz\threading”

Somebody know what does it mean?