Thanks for the link Nick. I didn't realize IPN was something special.

On 8/3/07, Nick Sweeney <[EMAIL PROTECTED]> wrote:
> I just ran into some of these issues when I had to write an IPN a few weeks
> back.  Mine does almost everything yours is doing - so I know it can be
> done. (I also log and save a duplicate of the PayPal transaction into my
> website db so I don't always have to hop back and forth between sites.)
>
> I learned a lot from this tutorial: http://tutorial23.easycfm.com/
>
> First - try the forums under your sandbox PayPal account - great resource
> for any specific questions you may have. They were very helpful to me and
> people respond quickly to your posts.
>
> Second - try to view your IPN.cfm directly from the website - and see if you
> get any errors. You should - but you should probably only get the "Element
> FIELDNAMES is UnDefined in Form." (Because you are not receiving form data
> from PayPal.)  Any other errors will probably show up here which will help
> you out. (Quick way to find typos, etc)
>
> Third - Setup a log file and track where your IPN is breaking. This was very
> helpful for me. Basically - I placed <cftry> around all the different parts
> with a catch like:
>
>         <cfcatch>
>         <!--- let's log all errors --->
>         <cffile action="append"
>                      file="E:\YOURSITE\paypal_logs\paypal_log.txt"
>                   output="Error entering cart items: #cfcatch.message#
> #cfcatch.detail# :: #Now()#">
>         </cfcatch>
>
> Fourth - Probably a good idea to setup some <cflocks> as well.
>
> Fifth - Are you using a PDT.cfm file as well?  And do you have the IPN
> setup/turned on in your PayPal account?
>
> Hope that helps!
>
> - Nick
>
>
> 

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