Mac Python Cannot load the LJM library

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Sat, 05/27/2017 - 09:30

SteveK

Mac Python Cannot load the LJM library

I am on a mac running Sierra 10.12.2. Starting to look at using Python 2.7 to talk to a T7.

I installed the LJM library and Kipling seems to work as expected.

I then installed LJM Python v1.1.0. Installation seemed to proceed OK.

Then

sudo python t7.py

gives the error:

Cannot load the LJM library libLabJackM.dylib. dlopen(libLabJackM.dylib, 6): image not found

Any suggestions?

Thanks

Tue, 05/30/2017 - 13:24

LabJack Support

In the Python LJM download,

In the Python LJM download, modify this line of code in the ljm.py file (in the \labjack\ljm directory):

if(sys.platform.startswith("darwin")):
#Mac OS X
libraryName = "libLabJackM.dylib"

To:

if(sys.platform.startswith("darwin")):
#Mac OS X
libraryName = "/usr/local/lib/libLabJackM.dylib"

Then reinstall the Python LJM package with the modification and see if that helps with the image not found error.

We've been noticing on newer Mac OS X / macOS versions that the /usr/local/lib directory is not always included in the system's library search path, so the path to our library needs to be included when loading it. In a future update we will include a similar change to Python LJM for Mac users.