Cannot install MT version 3.7.1 to Joomla 3.4.8

[markyoung]

I get the error message shown below. Did previously have MT on Joomla 2.5 but stipped it off for the upgrade.

Thanks for any help.

Warning

JInstaller: :Install: Can't find XML setup file.

Duplicate entry 'note_simple_search' for key 'PRIMARY' SQL=INSERT INTO `j25_mt_config` (`varname`, `groupname`, `value`, `default`, `configcode`, `ordering`, `displayed`, `overridable_by_category`) VALUES ( 'note_simple_search', 'search', '', '', 'note', '2100', '1', '1'), ( 'note_advanced_search', 'search', '', '', 'note', '2200', '1', '1'), ( 'advanced_search_sort_by', 'search', '', '-link_featured', 'sort', '2250', '1', '1');

Package Update: There was an error installing an extension: com_mtree-3.7.1.zip

[dknight]

Hello,

For the record, I'm following up this issue through private support.

The issue is very likely due to old MT table that are still in the database, causing the 'duplicate entry' error. The solution typically involves removing the old MT database tables (#__mt_**) and attempt the reinstall again.