I am trying to install M4 morph ++ to a different runtime other than my main one but I got this error. Even installing his genitalia also show the same. V4 Morph ++ is also affected.

 

Passion is anger and love combined. So if it looks angry, give it some love!

The real restriction is that you must install them in the same Runtime as the base figure.

Choosing "DAZ Studio" as the install option avoids the unecessary check for Poser.exe
The alternative is to create a fake Poser.exe in the Runtime you want to install into (or you can just copy the real one).