@Override
	public boolean okMessage(final Environmental myHost, final CMMsg msg)
	{
		if((myHost!=null)
		&&(myHost instanceof MOB)
		&&(msg.amISource((MOB)myHost)))
		{
			if(((msg.targetMinor()==CMMsg.TYP_LEAVE)
				||(msg.sourceMinor()==CMMsg.TYP_ADVANCE)
				||(msg.sourceMinor()==CMMsg.TYP_RETREAT)
				||(msg.sourceMinor()==CMMsg.TYP_RECALL))
			&&(((MOB)myHost).fetchEffect("Chant_FreeVine")==null))
			{
				msg.source().tell(_("You can't really go anywhere -- you are rooted!"));
				return false;
			}
		}
		return super.okMessage(myHost,msg);
	}