A question about --continue

Hi,
        I'm not really clear on what --continue is supposed to do. I tried
this:

vcp p4://depot/main/apps/cpan/Ttk/...@1,1500 --continue revml:foo.rml

        Followed by:

vcp p4://depot/main/apps/cpan/Ttk/...@1500,2000 --continue revml:foo.rml

        And the resulting foo.rml only has the revisions above change
#1500.

        I also tried:

vcp p4://depot/main/apps/cpan/Ttk/...@1,1500 --continue revml:foo.rml

        Followed by:

vcp p4://depot/main/apps/cpan/Ttk/... --continue revml:foo.rml

        And vcp seemed to re-read every change from the p4 server.

        What is the correct way to use --continue? I'm dealing with an
extremely flaky subversion server right now that keeps timing out after I
slurp a few dozen revisions, and I thought that populating the revml file
incrementally with "-r" and "--continue" would be the way to go, but I'm
definately missing something here...

        Thanks,
                Tyler