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Error Occurred While Processing Request

Variable PREV is undefined.

 
The error occurred in C:/inetpub/wwwroot/try_rf2.cfm: line 269
Called from C:/inetpub/wwwroot/try_rf2.cfm: line 261
Called from C:/inetpub/wwwroot/try_rf2.cfm: line 257
Called from C:/inetpub/wwwroot/try_rf2.cfm: line 1
 
267 : 			</cfif>
268 : 				<!--- end add --->
269 : 			<cfset z = #m#-#prev#> 
270 : 			<cfset xdaily =  #total# + #z#>
271 : 		<cfelse>
Resources:

Browser   CCBot/2.0 (https://commoncrawl.org/faq/)
Remote Address   3.236.228.250
Referrer  
Date/Time   23-Apr-21 01:24 PM
Stack Trace
at cftry_rf22ecfm1709858069._factor5(C:/inetpub/wwwroot/try_rf2.cfm:269) at cftry_rf22ecfm1709858069._factor6(C:/inetpub/wwwroot/try_rf2.cfm:261) at cftry_rf22ecfm1709858069._factor20(C:/inetpub/wwwroot/try_rf2.cfm:257) at cftry_rf22ecfm1709858069.runPage(C:/inetpub/wwwroot/try_rf2.cfm:1) 

coldfusion.runtime.UndefinedVariableException: Variable PREV is undefined.
	at coldfusion.runtime.CfJspPage._get(CfJspPage.java:390)
	at coldfusion.runtime.CfJspPage._get(CfJspPage.java:352)
	at coldfusion.runtime.CfJspPage._autoscalarize(CfJspPage.java:1462)
	at cftry_rf22ecfm1709858069._factor5(C:\inetpub\wwwroot\try_rf2.cfm:269)
	at cftry_rf22ecfm1709858069._factor6(C:\inetpub\wwwroot\try_rf2.cfm:261)
	at cftry_rf22ecfm1709858069._factor20(C:\inetpub\wwwroot\try_rf2.cfm:257)
	at cftry_rf22ecfm1709858069.runPage(C:\inetpub\wwwroot\try_rf2.cfm:1)
	at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:244)
	at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:444)
	at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65)
	at coldfusion.filter.IpFilter.invoke(IpFilter.java:64)
	at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:443)
	at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48)
	at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
	at coldfusion.filter.PathFilter.invoke(PathFilter.java:112)
	at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:94)
	at coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:79)
	at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
	at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
	at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46)
	at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
	at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
	at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62)
	at coldfusion.CfmServlet.service(CfmServlet.java:219)
	at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)
	at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:414)
	at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:210)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:298)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)