BUG REPORT impEX 1.9.6 (4)
 

when you are importing blog comments
if you already imported blog and first blog_text,

this line in your module
Code:
if ($this->restart($sessionobject, $displayobject, $Db_target, $Db_source, 'clear_imported_blog_comments'))
will still clear all your blog_text :( before importing or restarting importing

here is the solution,

impex/ImpExDatabase_blog_001.php

function clear_imported_blog_comments(....)

this one
Code:
$blogs = $Db_object->query("DELETE FROM {$tableprefix}blog_text WHERE importblogtextid 0");
should be
Code:
$blogs = $Db_object->query("DELETE FROM {$tableprefix}blog_text WHERE importblogtextid 0 AND blogtextid NOT IN (SELECT firstblogtextid FROM {$tableprefix}blog WHERE importblogid 0)");
if you already had your first blog_text imported in your previous module.
also having
define('dupe_checking', true);
$try->_dupe_checking = true;
won't hurt when you are importing blog comments (if you already imported blog and first blog_text)