DocBook Simple Table Problem (using xmlto)

[Dr. Laurence Leff]

I am having trouble with tables under docbook. I am using xmlto under Redhat
Linux. When I process a simple table as below, I get an error message about
the Unit of Measure. If I change the colwidth from "1*" to something specific
like "1in" it works. Yet the docbook manual indicates the "1*" stands for
one column width. I tried specifying "pgwide" for my "table" but that
did not help.
Dr. Laurence Leff Western Illinois University, Macomb IL 61455 ||[phone]
Stipes 447 Assoc. Prof. of Computer Sci. Pager: 309-367-0787 FAX: [phone]
Secretary: The OASIS Legal XML Member Section Court Filing Technical Committee
and Electronic Contracts Technical Committee

Here is the chapter one file that is being brought in.
__________________________________________________ ________________
<?xml version='1.0' ?>
<chapter id="ch1"><title>Binary Numbers and the Layers of Computer Organization</title>
<table frame="all" rowsep="1" colsep="1" >
<tgroup cols="2">
<title>IBM 360 opcodes</title>
<colspec colwidth="1*"/>
<colspec colwidth="1*"/>
<thead>
<row>
<entry>instruction</entry><entry>binary</entry>
</row></thead>
<tbody>
<row><entry>L</entry><entry>10101000</entry></row>
</tbody>
</tgroup>
</table>
</chapter>
__________________________________________________ _____________________
I get the following error messages:

! Illegal unit of measure (pt inserted).
<to be read again>
0
l.2 ..."100%"><fo:table-column column-number="1"/>
<fo:table-column column-nu...

?
! Emergency stop.
<to be read again>
0
l.2 ..."100%"><fo:table-column column-number="1"/>
<fo:table-column column-nu...

! ==> Fatal error occurred, the output PDF file not finished!
Transcript written on notes.log.
-bash-2.05b$