The 33-year-old, signed in January by Valerien Ismael following an injury to Daryl Dike, was released by Steve Bruce at the end of the season and did not play for Albion during the final games of the campaign.
It was reported earlier this week that the Belgian side had offered him a route back into the game - as he went on trial with the club.
According to reports in Belgian he has been undergoing physical tests ahead of a possible move - with Carroll having suffered a catalogue of injuries throughout his career.
However, according to Belgian website HN his trial period has now been cancelled following the completion of the tests and the club are making a move for Stoke City striker Benik Afobe.
It comes as a blow to Carroll, who signed for Albion for Reading after impressing for the Royals in the first half of the season.
After his short term contract came to an end Albion snapped up Carroll until the end of the season and he went on to play 15 times for the club, scoring 15 goals, including a memorable last minute equaliser against Huddersfield Town.
Carroll became a favourite among the Albion fans during his short spell at the club - with many hoping he would remain at the club for the coming season.