truncating listener.log on Windows

How do you truncate the listener log file without bouncing the listener?

I know how to do this on UNIX, but when I try "echo > listener.log" I get "cannot access the file because it is being used by another process". The other option, appears to be to use the lsnrctl "set log" command followed by "save config", but, according to MOS, this may crash the listener.

Any other options?

Thanks,
Peter Schauss

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