The last classic import I did was around 2 years ago
I went from classic directly to ubb 7.5.7 then upgraded to whatever the current version was at the time.
I recall the only issue was polls did not come over with the import there were around 75 polls out of a total of 2.8 millionj+ posts..
I did tweak some of the settings because the first try took 5 days but after it still took 3 days
Here is the settings I used
Code
set_time_limit( 300 );
define('IS_IMPORT',1);

$site_id = 1;


// Is this script uploaded correctly?
ckthis( "../includes/config.inc.php", 0 );
ckthis( "../libs/ubbthreads.inc.php", 0 );

define( "MAX_POSTS_PER_PAGE", 100 );
define( "MAX_TOPICS_PER_PAGE", 14 );
define( "MAX_REBUILDS_PER_PAGE", 400 );
define( "MAX_MEMBERS_PER_PAGE", 300 );

If you see a lot of errors start to appear just lower the numbers some. And start over.
But that means clean up of the database so make a db backup before you begin.

One last tid bit older versions of UBB do not support php7

One other thing I recall because of the disparity of different versions of scripts and server software requirements between the old and new..
I ran all my tests on
xampp-win32-1.7.3.exe.
Of course it depends on the size of the classic site and what software is installed and what can be changed on the hosted site. And if you can keep it down that long.
In this case the owner opted to leave the classic site running because they did not want to go offline for days.
They under stood they would loose posts and members added during the time duration.

Last edited by Ruben; 09/17/2019 2:51 PM. Reason: add comment.
Blue Man Group
There is no such thing as stupid questions. Just stupid answers