CFExecute not working for imagemagick's command - coldfusion

Question

I am running the following command using ColdFusion's cfexecute: composite -geometry +2+2 "C:\Inetpub\wwwroot\isubscribe_uk\diomedes\www\images\newsletter\316\resized.png" "C:\Inetpub\wwwroot\isubscribe_uk\diomedes\www\images\newsletter\templateImages\isubscribe\blank.png" "C:\Inetpub\wwwroot\isubscribe_uk\diomedes\www\images\newsletter\316\part1.png"
<cffunction name="executeWrap" returntype="string">
<cfargument name="commandToRun" type="string" required="Yes">
<cfargument name="cmdArg" type="string" required="Yes">
<cfset var result = "">
<cfexecute name="#arguments.commandToRun#" arguments="#arguments.cmdArg#"
variable="result" timeout="15" />
<!--- <cfdump var="#arguments#">
<cfdump var="#result#"> --->
<cfreturn result>
</cffunction>
For some reason the above thing does not work. Though when I run the command directly onto the command prompt then it works.
Any ideas please?

Answer 1

CFExecute ignores anything sent to standard error by the called process. To be able to see if there is any error output generated, add the "errorVariable" argument to your cfexecute call, then check if there is anything there and let your script react accordingly.
<cfexecute name="..command to run..."
arguments='.. your arguments...'
variable="results"
errorVariable="errorOuptut"
></cfexecute>
<cfif len(errorOuptut)>
<cfthrow message="#errorOuptut#" />
</cfif>
More info here:
http://www.raymondcamden.com/index.cfm/2008/4/9/ColdFusion-801-change-to-CFEXECUTE