Version using Application.cfm and cferror

Application.cfm

<cferror template="./outputError.cfm" type="request">

brokenInclude.cfm

<cfset emailname = len(ediDetails.firstname) ? ' ' & ediDetails.firstname : emailname = ''>

brokenInclude.output

he web site you are accessing has experienced an unexpected error.
Please contact the website administrator.

The following information is meant for the website developer for debugging purposes.
Error Occurred While Processing Request
Invalid CFML construct found on line 1 at column 87.
ColdFusion was looking at the following text:
=

The CFML compiler was processing:

A cfset tag beginning on line 1, column 2.

main.cfm

<cfinclude template="./brokenInclude.cfm">

main.output

Invalid CFML construct found on line 1 at column 87. ColdFusion was looking at the following text:

=

The CFML compiler was processing:

A cfset tag beginning on line 1, column 2.

The error occurred on line 1.

OutputError.cfm

<p>#error.diagnostics#</p>