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				  MEMORANDUM
   
   
   TO:     Bob Moore
   
   FROM:   Keith Corbett
   
   DATE:   August 11, 1986
   
   SUBJ:   Carnegie Group Port In Trouble
   
   COPY:   John Salis, Wendy Rowe, Mike Grandfield
	 
   It seems my memo of 7/17 on Dario Guise's excellent progress while
   porting Knowledge Craft to Release 3.0, was overly optimistic.
   
   He has stopped work on the project for two reasons: first, they are
   going to port a more recent version of their product, and second, they
   encountered a severe limitation in our software.  He feels he may not
   be able to continue the project without a fix to this problem.
   
   Our system only allows 64 slot variables on a Defstruct.  (Common-Lisp
   apparently does not specify whether there is a limit.) Knowledge Craft
   has many Defstruct's that are too large, and they feel it would be too
   much work to modify the code to take this restriction into account.
   
   The compiler error message is very unfortunate (but very accurate):
   
   
     >>ERROR: Compiler-internal error
	      You have been screwed!  Local-variables block exceeds 
		 maximum length by: 18
     Backtrace from the debugger:
     
     COMPILER::BARF (P.C. = 39)
     
      Arg 0 (EXP): 18
      Arg 1 (REASON): "You have been screwed!  Local-variables block exceeds maximum length by"
	--Defaulted args:--
      Arg 2 (IGNORE): NIL
   
	   :
	   :
	   :
   
   
   The bug report describing this problem has been forwarded to Engineering
   via the electronic mail.  [Wendy, please take note.]
   
   He ran into other, minor problems which he has successfully patched.
   This is typical of many of our customers who find they must do their
   own system software maintenance.  (Some consider this an advantage of
   our system; I consider it a negative statement about LMI software
   quality.)
   
   KMC