Image optimizer Magento1.9.3.2

Question

I am using Apptrian Image Optimizer. The extension for Magento1. I have given all the necessary permission to the files which are responsible for optimizing. Still, I am getting the following error when turn on the error logs:-

DEBUG (7): optipng is not executable.

Please let me know if I have to install the utilities on the server as well. Or is there any way out to get this done, by not using the exe files

P.S:- I have also checked the files and they are not corrupted

Answer 1

Check if the optipng binary is available:

which optipng

If it was found, make sure it has the correct access permissions:

chmod +x PATH_FROM_optipng