We had some errors when upgrading too. Can't remember if it was the same as yours.
But our fix was in the "Default RACF ListUser AttrParse".
In 1.6 this section :
<str name='DFLTGRP' len='8' trim='true'/>
<t> PASSDATE=</t>
<str name='PASSDATE' len='6' trim='true'/>
<t> PASS-INTERVAL=</t>
"PASSDATE" and "PASS-INTERVAL" had two spaces in front of them.
In 1.8 it only has one :
<str name='DFLTGRP' len='8' trim='true'/>
<t> PASSDATE=</t>
<str name='PASSDATE' len='6' trim='true'/>
<t> PASS-INTERVAL=</t>
Maybe related.
Steve