If you are in a networked configuration, check with your local MATLAB administrator. If you have a standalone installation and the above suggestion does not work, do contact Matlabsolutions, they will help you.
Question
Hi I have been having problems with using the imshow function, and other functions related to the image processing toolbox. I've been getting messages like these when I try to use them: ??? Undefined function or variable 'implay'. ??? Undefined function or variable 'imtool'. or ??? Undefined function or method 'imshow' for input arguments of type 'uint8'. I'm pretty sure I have the image toolbox installed because when i check the version this shows up in the list: Image Processing Toolbox Version 7.2 (R2011a) So if anyone could provide any help I would really appreciate it as this is kind of an urgent matter. Thanks.
Expert Answer
Kshitij Singh
PhD Expert
Answered Sep 9, 2026
Hi,
Can you use any of the functions in Image? If not, are you working in a networked configuration where you have to checkout licenses?
What does:
license('test','image_toolbox')
return?
If that returns a 1, then perhaps try
addpath(genpath([matlabroot '\toolbox\images\']))
savepath
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