I am a student working in a physics lab and my PI gave me this LabJack U3-LV and I need to lean how to use it. I have absolutely no experience with data acquisition technology. I wanted to putt around with a few examples but I keep getting a similar error. I need help getting started I have mac running el capitan. Could you lead me to any type of begginers guide to data acquisition hardware? I know how to code in python but this is my first time doing hardware and I need help getting started.
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Taken from a comment on our LabJackPython page which should help your issue:
"stat() failed with errno=13" indicates file or folder permission issues. Check your /usr/local/lib directory and make sure both the directory and the library files (libusb and liblabjackusb) have read and execute permissions for all users and groups. The installer should install the files with the correct file permissions, and /usr/local/lib should have these permissions but I've seen cases where this is not true.
Using a terminal you can check permissions with the following commands:
ls -l /usr/local/
ls -l /usr/local/lib
Permissions should look like "drwxr-xr-x" or "-rwxr-xr-x". To change the permissions in a terminal use the chmod command on the directory and files you want to change. For example, to add read and execute permissions to the /usr/local/lib directory for all users and groups use this command:
sudo chmod a+rx /usr/local/lib
Also, take a look at our LabJackPython page as it provides helpful information and a couple of quickstart links. Also, our U3 datasheet provides detailed information about the U3 in general.