* Trade not halted
* Problem affects clients using London data feed
JOHANNESBURG, Oct 9 (Reuters) - The Johannesburg Stock Exchange said on Tuesday that some users were unable to see market data due to a system glitch, but that trade had not been halted.
"The JSE and its service provider are still investigating the issue. The JSE will not be halting the market," the JSE Ltd , which operates Africa's biggest bourse, said on its web site.
The problem was affecting clients using a data feed from London, it said.
Problems with the connection between Johannesburg and London have plagued the JSE in recent years, sparking system glitches that have forced the bourse to halt trading several times.
One network meltdown in 2010 caused trading to stop for six hours.
The bourse this year launched a revamped trading platform to woo more business from hedge funds and cut down on system trouble.
(Reporting by David Dolan; Editing by Jon Herskovitz)
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