jade/sgml unexpected message

[Patrick Powell]

I have a bunch of legacy documents done using the DocBook SGML and 
jade.  I updated to FreeBSD 9.3 and installed all of the required 
packages using pkgng.   When I tried to generate the legacy documents,  
I got the following error:

jade -Vtex-backend -ioutput.print -t tex -o admin.tex  -c 
/usr/local/share/sgml/catalog  -c 
/usr/local/share/sgml/docbook/dsssl/modular/catalog -d RMIS.dsl admin.htmp
jade:/usr/local/share/sgml/docbook/dsssl/modular/print/../common/../common/dbl1mn.ent:8:28:E: 
"1058" is not a character number in the document character set
jade:/usr/local/share/sgml/docbook/dsssl/modular/print/../common/../common/dbl1mn.ent:9:28:E: 
"1090" is not a character number in the document character set


I you look at ... dbl1mn.ent you will see:
<?xml version="1.0" encoding="US-ASCII"?>
<!-- This file is generated automatically. -->
<!-- Do not edit this file by hand! -->
<!-- See http://docbook.sourceforge.net/ -->
<!-- To update this file: edit the corresponding document at -->
<!-- 
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/docbook/gentext/locale/ -->

<!ENTITY Abstract "Товч 
агуулга">


It appears that the Unicode &#1058 characters are illegal in the 
document character set.

Question:  do I need to change the character set in the document, and if 
so, how do I do it?