anchor.diff:  %%
   install(Nodes) when is_list(Nodes) ->
   	try
  +		init_mnesia(Nodes),
   		case mnesia:wait_for_tables([schema], ?WAITFORSCHEMA) of
   			ok ->
   				ok;
  
positive.code: force([]) ->
  	ok.
  
  
negative.code: 		Tables = [client, subscriber, httpd_user, httpd_group],
  		case mnesia:wait_for_tables(Tables, ?WAITFORTABLES) of
  			ok ->
  				add_default_user(),
  				Tables;
  			TablesResult ->
  				throw(TablesResult)
  