Existing change items can be re-indexed (put to Push Grid) with a handy command line script. This script is in Magento’s shell/ folder and it’s named reindex_changeitems.php.
Help and command arguments’ reference for this program can be displayed like this:
php reindex_changeitems.php -h
In order to re-index all items in your Magento do this:
php reindex_changeitems.php -a
Warning! Re-indexing all items can be very timeconsuming. It depends on the amount of existing data in your Magento database.
This feature exists since MageFlowConnector (MFX) 1.3.6. Always use the latest version of MFX.