target.db cannot be generated with Saxon?

I'm messing with olinks and I'm trying to generate my target.db files 
from the command line (Windows 10) with Saxon HE10-1J and I keep getting 
no target.db file and this error:

Writing target.db for book(MailUserGuide)
Can't make chunks with Saxonica's processor.
Error at char 16 in expression in xsl:value-of/@select on line 380 
column 63 of chunker.xsl:
   XTMM9000  Processing terminated by xsl:message at line 380 in chunker.xsl
at template write.chunk on line 89 of chunker.xsl:
      invoked by xsl:call-template at 
file:/C:/Users/mark/docbook/docbook-xsl-1.79.2/common/targets.xsl#60
   In template rule with match="*" on line 48 of targets.xsl
      invoked by built-in template rule (text-only)
   In template rule with match="/" on line 420 of docbook.xsl
      invoked by xsl:apply-templates at 
file:/C:/Users/mark/docbook/docbook-xsl-1.79.2/html/docbook.xsl#490
   In template rule with match="/" on line 420 of docbook.xsl
Processing terminated by xsl:message at line 380 in chunker.xsl

Does this not work with Saxon? I can run this successfully on Ubuntu 
using xsltproc (using Windows Subsystem for Linux so I can run ubuntu on 
the same file system).

Thanks,
Mark