Y_LAUNCH       the directory containing the Yorick executable  
             Y_SITE         Yorick's "site directory"  
  
     Y_LAUNCH is set by compiled code when Yorick starts and should never  
              be modified.  
     Y_SITE is set to a default built-in value by compiled code at startup,  
              but may be modified in the file Y_LAUNCH/paths.i to allow for  
	      ports of Yorick binary executables.  

unknown type function, documented at startup/paths.i   line 91