error: =: nonconformant arguments

[TopperBG]

Few attempts to debug gst processes but always that message:

[error] Event id 512 is outside range.
[error] Reading event failed.
Error printing trace.

Loading proctime events...
Loading interlatency events...
Loading scheduling events...
Loading framerate events...
Loading bitrate events...
Loading queuelevel events...
Loading cpuusage events...
Loading buffer events...
Processing proctime...
error: =: nonconformant arguments (op1 is 1x1, op2 is 0x1)
error: called from
    load_serie_timestamp_value at line 85 column 65
    plot_proctime at line 3 column 46
    ./gstshark-plot.m at line 33 column 13

Attaching data files
datastream.txt
metadata.txt
(ommit txt extensions)

octave -v
GNU Octave, version 6.2.0

Any ideas ?