I think this maybe a bug from M5 TO M6.
when moved from M5 to M6 using the no inheritance application.cfc with
per application mappings all system errors now give me the error
below. this was not the case in M5.
Could not find the included template ../includes/BugReport.cfm.
Note: If you wish to use an absolute template path (for example,
template="/mypath/index.cfm") with CFINCLUDE, you must create a
mapping for the path using the ColdFusion Administrator. Or, you can
use per-application settings to specify mappings specific to this
application by specifying a mappings struct to THIS.mappings in
Application.cfc.
Using relative paths (for example, template="index.cfm" or
template="../index.cfm") does not require the creation of any special
mappings. It is therefore recommended that you use relative paths with
CFINCLUDE whenever possible.
The error occurred in C:\inetpub\wwwroot\cms.yourbrandreality.co.uk
\coldbox\system\web\services\ExceptionService.cfc: line 87
Called from C:\inetpub\wwwroot\cms.local.co.uk\coldbox\system
\Coldbox.cfc: line 307
Called from C:\inetpub\wwwroot\cms.local.co.uk\Application.cfc: line
61
85 : <cfelse>
86 : <!--- Save the Bug Report --->
87 : <cfsavecontent variable="cboxBugReport"><cfinclude
template="../includes/BugReport.cfm"></cfsavecontent>
88 : </cfif>
89 : <cfreturn cboxBugReport>