Thanks for getting back to me on this, much appreciated.
First I looked for the tpl_modules_shipping_estimator.php and it is using the one in my custom template folder. I compared it to the original from 1.5.1 and the one from my previous 1.3.9 install and can confirm that it is the one modified by OZPost for this release.
Then I replaced it with an original 1.5.1 file as suggested and visited the checkout.
That made it look like this screenshot. It didn't seem to do anything or provide any results:
http://s21.postimg.org/k87o5xzif/ozpost_4.jpg
Then I enabled debug to see what it would show - That was this:
http://s21.postimg.org/n8oimhatj/ozpost_5.jpg
Then I progressively enabled Australia Post Letter, Satchels and Parcels until all were ticked, checking for a change in behavior along the way. It showed no results no matter what I selected.
I've now restored the OZPost tpl_modules_shipping_estimator.php again now and have left Regular and Express Australia Post Parcels enabled in addition to the satchels I had all along. I restored it to the non-working state in case you need to see it fail.
A suitable test product again is one like this:
http://www.saxandwoodwind.com.au/ind...oducts_id=1107
Is there possibly a permissions problem with this? One of the fiddly bits to get right with Zen Cart on IIS is the file system permissions and I had to use the manual install method for this because I didn't have the permissions quite right when I upgraded OZPost. I'm wondering if it is trying to write a file somewhere that it can't?
I'm also wondering if I should downgrade to the OZPost I had on here before, but I won't do that unless you've run out of ideas.
Thanks for any further advice on this.
Regards
Rob



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