Arbortext Editor 6.1 error while printing

Getting an error in AT Editor 6.1 when trying to print a simple enough XML document.

The error window states "editor.exe: segment violation (signal 11)".

When I pull up the editor_err.log file in my Users\TEMP folder, it reads this:

PTC Arbortext Editor (Build R61M010-339) terminated unexpectedly at Thu Sep 25 14:18:18 2014:

editor.exe: segment violation (signal 11)

Current ACL statement at "C:\Program Files\PTC\Editor61\packages\main\_winev.acl":71:

   71 [1]   return

ACL function traceback at time of error:

#1   print::modified_print() at "C:\Program Files\PTC\Editor61\packages\main\_winev.acl":71

Local variables of active function:

$p1=0

$p2=0

$o1=(-1,0,0)

$o2=(-1,0,0)

I have no ideas what could be going on. The XML document I'm trying to print is extremely simple:

<!DOCTYPE OUR CUSTOM DOCYTPE HERE>

<searchList>

<row>

<searchTerm></searchTerm>

<context>printOnly</context>

<description></description>

<highlightStyle><style type="highlight"/></highlightStyle>

</row>

</searchList>

Has anyone seen this error before?