Hi all,
Thank you very much for all your suggestions and apologies for not replying sooner, its been a busy few days.
I have tried all of the suggestions, but it still fails at the same point.
I then tried changing the image path in the failing template to the image that seems to be working. The template then completed successfully.
This tells me it must be something to do with the image as everything else in the template seems to work fine. I dont understand it though as I have tried several times to recreate the image (which is based on the image which does work!)
Argh!