Problem with exporting from one site to another

I’m in the process of exporting posts from one of my sites (both WordPress using the same theme) to another and because doing it in one go is impossible because of the 24mb limit on the size that can be imported, I decided to do it one category at a time, tedious though this is.

The first four categories worked well but after that although the export seemed to work ok, creating an XML file, importing doesn’t, even though I followed the same procedure.

No error messages and no sign of the imported posts.

Bill