mmcat failure

/mmcat 01001.mp4 01002.mp4 01003.mp4 out.mp4                                                   127
MultiMedia Concat Script v1.0 (mmcat) - A script to concatenate multiple multimedia files.
Based on FFmpeg - www.ffmpeg.org
Don't forget to edit this script and change EXTRA_OPTIONS

ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 19 2012 10:44:04 with clang 4.0 ((tags/Apple/clang-421.0.60))
  configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-libfreetype --cc=/usr/bin/clang --host-cflags='-Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.8' --host-ldflags='-L/usr/local/Cellar/gettext/0.18.1.1/lib -L/usr/local/lib -L/opt/X11/lib' --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --disable-ffplay
  libavutil      51. 54.100 / 51. 54.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.100 / 54.  6.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[u16le @ 0x7fbe39806600] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, u16le, from '/tmp/mcs_a_all':
  Duration: N/A, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
/tmp/mcs_v_all: Operation not permitted