With OJS 2.4.6 and regarding the next screenshot:
issues from 17 to 14 are exported correctly, but issues from 13 to 10 are not exported and the following page is opened:
Articles from 17 to 10 are exported correctly.
Please, how could I fix it?
Have you checked your PHP error log? There should be more information there.
Public Knowledge Project Team
We ran into this problem also and did not check our error log (for which I am now kicking myself). However, we found that when we got this error, we could still export the individual articles from a given issue and recreate the issue using the import side of the plugin on the new journal. It was tedious, but it worked.