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I am using this document as a guide and i ran through this error 

Install the project...
-- Install configuration: "RELEASE"
CMake Error at cmake_install.cmake:36 (file):
  file cannot create directory: /installation/OpenCV-/share/licenses/opencv4.
  Maybe need administrative privileges.
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    Is this answer of your question? Commented Feb 13, 2020 at 13:31
  • Yes it does thank you Commented Feb 13, 2020 at 13:51

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I just encountered the same problem as you. I found out that it is not a permission problem, but a path problem of OpenCV installation.

I use the following method for successfully installing OpenCV4.2.0 to my computer.

Change the path:

-D CMAKE_INSTALL_PREFIX = $cwd/installation/OpenCV-4.2.0

To

-D CMAKE_INSTALL_PREFIX = /usr/local

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