Installation of the add-on

[mabuh004]

I tried to install the add-on using the provided way, which is: (Copy the range_scanner folder to C:\Program Files\Blender Foundation\Blender 2.83\2.83\scripts\addons_contrib (Windows).)

However, when I try to activate the add on in Blender, this message appears,

How it can be solved?

Regards.

[Reitmania]

Hi, looks like you don't have the pypng python package installed on your computer. Try pip install pypng.

Best regards, reiti

[ln-12]

The installation under Windows can be tricky. In case it does not work after the pip command @Reitmania mentioned, try to force the installation of all dependencies for Blenders included python with admin privileges (important):

"C:\Program Files\Blender Foundation\Blender 2.83\2.83\python\bin\python.exe" -m pip install laspy h5py pascal_voc_writer pypng pyyaml

[mabuh004]

how can I try these things? in python? or in blender?

[Reitmania]

neither python nor blender, you should open a Windows command window and use the mentioned commands - at best the one of @ln-12 above

(e.g. if you install pypng with pip, you can check the installation in python via "import png". The bug should also disappear in the BlAInder add-on)

[mabuh004]

I opened the command window and used the mentioned command,

After that I checked the python using import png, but the bug is still existed in the add-on.

[ln-12]

Did you run it as admin? If yes, try to remove the folder pypng from that location.

[mabuh004]

@ln-12 when I run it as admin, this happens

[ln-12]

Well, I tried the install procedure on a fresh install of Windows and your error only occurred when running the command prompt as normal user. After starting it as administrator (for description see here), it worked as intended. Your error message also suggests that you do not run it as admin. If you really did run it as admin, I currently do not see why it is not working to be honest.

[mabuh004]

@ln-12 @Reitmania Thank you so much! It is working now.