MOSCOW (Reuters) - Two Russian cosmonauts made what will probably be the last spacewalk from the 14-year-old space station Wednesday, officials at Mission Control outside Moscow said.

``They completed the full program successfully,'' said Mission Control spokesman Valery Lyndin.

Because the cosmonauts were only testing the potential of the antenna, they trashed it into open space after finally getting it to open.

The two Russians and Frenchman Jean-Pierre Haignere, who remained on board Wednesday and videotaped the spacewalk, are expected to return to Earth on August 28.

Mir will continue to orbit unmanned for several months afterwards as space officials make one final effort to find support for a station the government says it can no longer afford.

If new funds are not found Russia will probably bring down Mir in early 2000. This would be about the same time as the first crew is scheduled to begin living on the new International Space Station, in which Russia, the United States, Europe, Japan and Canada are involved.

Lyndin said the cosmonauts Wednesday did not look for the source of a pressure leak detected in late June and said the leak was not seen as a major problem.

Flight engineer Avdeyev -- the world's most experienced spaceman with a cumulative time of 717 days in space -- was making a spacewalk for his eighth time, and Afanasyev for his seventh.

Russian cosmonaut Anatoly Solovyov holds the record with 15 spacewalks.