Cannot load partial dump

Dear Colleagues,

I need to export one file's history to another repository. Here is
what I do and what error I get:

$ svnadmin dump repos/configs |\
        svndumpfilter --drop-empty-revs include /cisco/trunk/caracal-confg \
> tmp/test1.svn
[copious output deleted]

$ svnadmin create test2
$ svnadmin load test2 < tmp/test1.svn
<<< Started new transaction, based on original revision 540
     * editing path : cisco/trunk/caracal-confg ...svnadmin: E160013:
     * File not found: transaction '0-0', path
     * '/cisco/trunk/caracal-confg'

What am I doing wrong?

If I dump/load the complete repository (without svndumpfilter), the
operation is successful. But I don't need all the files from the old
repository.

Any advice is greatly appreciated.

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov_at_sibptus.tomsk.ru