error while creating repository from dumpfile

hi all,
I have created the dumpfile for my repository ...and then used svnadmin load to create the repository out of the dumpfile.....I got the following error....
<<< Started new transaction, based on original revision 6345
     * adding path : orphaned/_YGFBAAAA ... done.
     * adding path : orphaned/_YGFBAAAA/Report ... done.
     * adding path : orphaned/_ZHFBAAAA ... done.
     * adding path : orphaned/_ZHFBAAAA/ ... done.
     * adding path : orphaned/_NIFBAAAA ... done.
     * adding path : orphaned/_NIFBAAAA/App_ces ... done.
     * adding path : orphaned/_NJFBAAAA ... done.
     * adding path : orphaned/_NJFBAAAA/Service ... done.
     * adding path : orphaned/_RJFBAAAA ... done.
     * adding path : orphaned/_RJFBAAAA/Service ... done.
     * adding path : orphaned/_SJFBAAAA ... done.
     * adding path : orphaned/_SJFBAAAA/rService ... done.
     * adding path : orphaned/_WJFBAAAA ... done.
     * adding path : orphaned/_WJFBAAAA/Service ... done.
     * adding path : orphaned/_WJFBAAAA/M.....ade.d
iscomap ...svnadmin: File not found: revision 5831, path '/orphaned/_UDBBAAAA/..///....sie.discomap'



any reasons why could this be and how to solve this????
Thank u in advance.....