LSMASHAudioSource: failed to open resampler - 10 Audio channels with Avisynth

[kevinwells22]

Hi, I have hit a problem opening a Quicktime Prores in Avisynth, which has 1 audio track with 10 channels of audio in it. It works with 1 track with 2 audio channels, but with this file that has 10 channels I am getting this error:

LSMASHAudioSource: failed to open resampler.
(C:\Users\me\Desktop\test.avs, line1)

Here is the avs script:

LSMASHAudioSource(source="10_ch_test.mov", track=2)

I am using 'LSMASHSource-AviSynth-plugin-r877-msvc-32bit.7z'.
It doesn't matter if there is 1 track of 10 audio channels, or 10 tracks with 1 channel in each, it still seems sot fail with the same error.
Is there anything I can do to get round this, is it a channel limitation?

Here is a small sample which shows the error:

10_ch_test_1_frame.mov.zip