Well, I got there, but by a slightly different route.
If I tried to go to 1.9 first, I got errors about the database object not having a qn() method.
Something to the effect of:
Code:
Fatal error: Call to undefined method JDatabaseMySQLi::qn() in tmp/com_comprofiler/install.comprofiler.php on line 78
The method does not appear in my J! 1.6 source tree ... SO ... I replicated the site to a staging server and tried it with the J!1.6 -> J!2.5 first, using the JUpdate feature in the Extensions Manager. Then updating to CB 1.9 went pretty smoothly.
So, ... it looks OK so far, but I had to update Joomla first.
Thanks,
Patrick