The project to revamp the LME's electronic system was due to go live in June this year.
Sources said the front-end trading platform developed by U.S.-based Trading Technologies does not work for the complicated structure of contracts on the LME.
In response to a request for comment, Trading Technologies said: "We would defer to the LME on this."
The problem comes from the LME's unique date structure which allows trading for any day between the cash contract and the benchmark three-month forward.
One important aspect, the LME said, is aligning its platform with other exchanges.
Persons:
Peter Nicholls, Pratima Desai, David Evans
Organizations:
London Metal Exchange, City of, REUTERS, Companies Hong Kong Exchanges, Trust, Hong Kong Exchanges, HK, U.S, Technologies, Trading Technologies, Thomson
Locations:
City, City of London, Britain