XF 1.1 Import debug

Are there any options that can be enabled to debug the importer ?

It always stops when importing posts with "page was reset" message. I really need to add something so I can be sure where it is stopping. Looking at the database, I see nothing wrong with the last post and cross referencing it with the source (IPB) database to look at the next and previous one I also see nothing wrong.

As a test I removed those few posts and threads from the source and tried again afresh but it still stopped.

I need to add something to force a debug log or suchlike a detailed one. There are no errors in wampserver logs to assist.

Out of interest it also fell over around the same point when trying to use Impex to test a VB conversion, I had an idea of going that way then back here (IPB > VB > XF) if it worked but no.

The database is quite large around 600,000 posts.

I am not sure if I should just manually add something if I neeed to but if there are setting / flags I can enable it will save a lot of time and trouble.

Thank you for any assistance and thoughts.