WINDOWS user please notice below issues:

If you are going to upgrade Miarmy 2.7 to 2.75 or 3.00 or higher, there might be some problem after you upgrading:

Issue 1.

When load Miarmy, there is an error message:

That is means the lack of dll files

Please solve it by:

    (1) close Maya

    (2) open the folder C:\Program Files\Basefount\Miarmy\bin, and select all the dll files

    (3) copy all of these dll files to Maya Bin folder C:\Program Files\Autodesk\Maya2012\bin

    (4) open Maya

Issue 2.

...\Miarmy\Basefount\Miarmy\maya\scripts\McdRenderVRFunctions.py line 608: 'NoneType' object has no attribute 'set' # shows up on my script editor and nothing is rendered

This error is caused by that you didn't copy the v-ray dso to the correct folder:
Would you please make sure copy the dll

(below is only for refering, it based on your os, maya and vray version)
from: 
C:\Program Files\Basefount\Miarmy\bin\vray\vray_3.1_3.3_3.4\Maya2015and2016
to:
D:\Program Files\Autodesk\Maya2016\vray\vrayplugins

Issue 3.

Cannot found "Miarmy" menu in my Maya, and cannot found Miarmy in Plugin-in Manager.

Please check the module path setup which is the step 4, 5, 6 in installation guide

Issue 4.

When first time load Miarmy in Maya 2014 or above, there will be a shelf error:

And the arrangement in shelf is very sparse.

Solution:

Re-start Maya, everything will be back OK.

Issue 5.

In MAC OS X installation.

Maybe you put the MiarmyForMaya.txt into below folder which is incorrect:

Applications/maya2015/modules/MiarmyForMaya.txt

The correction one should be:

Applications/maya2015/Maya/Contents/modules/MiarmyForMaya.txt
Please click right mouse button and click "show contents" on Maya.app