Hello James,
As per my understanding, you are encountering an error while reading a ULOG file from a PX4 Autopilot using ‘ulogreader’ in MATLAB R2022b.
This is a known issue in MATLAB releases prior to MATLAB R2023b. There are two possible workarounds for resolving the issue:
1) Upgrade to MATLAB R2023b.
2) In the MATLAB command window, execute the following code:
matlabroot
% Use the path obtained as the output of above command to replace ‘matlabroot’ in the command given below.
cd matlabroot\toolbox\uav\uavmatlab\+uav\+internal\+ulogread
open ulogparse.m
On line 971: replace
keylen = data(1);
with
keylen = uint32(data(1));
then restart MATLAB.
I hope this resolves the issue you were facing.
