I'm struggling with an obstinate problem:

)show SI

 SIunits is a package constructor
 Abbreviation for SIunits is SI
 This constructor is exposed in this frame.
------------------------------- Operations --------------------------------

   >> Error detected within library code:
   index out of range


Although the package compiles and works perfectly, the )show command
persistently displays "index out of range". By exclusion I could reduce the
problem to:

)abbrev package SI SIunits
SIunits : Exports == Implementation where

    USY ==> ['m,'kg,'s,'A,'K,'mol,'cd]
    SIU ==> PhysicalUnitSystem(USY)

    Exports == with

      %m   : Integer -> SIU

The "-> SIU" is the source of the evil. When changing SIU to INT for example,
then there is no problem at all. I've been supposing that it might be an issue
in the interpreter code. A 'grep', however, only yields two candidates:


$ grep "index out of range" *.*
br-search.boot:      if startpos < 0 or startpos > n then error "index out of 
range"

match.boot:  if startpos < 0 or startpos > n then error "index out of range"

BTW: the full code is @ 
http://axiom-wiki.newsynthesis.org/SandBoxPhysicalUnitSystem

I've no idea :(
Any hints appreciated.
Kurt


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