try catch errror in log when trying to validate a cold fusion form.

I have a cold fusion form which requires me to add a try catch around the form fields. I keep getting an error message however when I try to add it. Code below thanks for any help you provide if you see something obvious I'm missing.

 <cftry> 	
   	<cfif NOT refind("^[DdFfGgHhNnVv][A-Za-z0-9]{1,21}$", form.Contract_Number) AND NOT refind("^70[Zz]0[a-zA-Z0-9]{2}\d{2}[a-zA-Z][a-zA-Z0-9]{8}$", form.Contract_Number)>
   	<cfcatch>
	   <cfset #session.invoiceDataContr.errorString# = "The Contract Number is required and can contain no more than 22 alphanumeric characters.,">
	</cfif>
    </cfcatch>
</cftry>

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error log message:
"Error","ajp-bio-8012-exec-3","07/25/17","11:45:07",,"Context validation error for the cfcatch tag.The tag must be nested inside a CFTRY tag. The specific sequence of files included or processed is: D:\inetpub\wwwroot\centralinv\central_inv_contr_verify.cfm, line: 121 "