Export journal sections?

Hi everyone,

I am trying to migrate a journal and then upgrading to OJS 3.
I use the export/import plugins to download the issues and users data. However, when I import these data I find that only 50 of the current 64 journal sections have been imported. Why could this be happening? There is any way to export the sections?

Thanks for your help.

Do you see references to all 64 journal sections in the export file, or are some missing from the file which was imported?

There are some missing. The 14 that left are not in the exported file.