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Error Occurred While Processing Request

Date value passed to date function DateAdd is unspecified or invalid.

Specify a valid date in DateAdd function.
 
The error occurred in D:/inetpub/wwwroot/2012.siouxfallsevents.com/addICal.cfm: line 11
 
9 :     <!--- End --->
10 : <!--- END QUERIES --->
11 : <cfset Variables.EventStartTime = #TimeFormat(DateAdd('H', 1, getDate.EventStartTime), "h:mm tt")#>
12 : <cfif getDate.EventEndTime IS NOT ''> 
13 : 	<cfset Variables.EventEndTime = #TimeFormat(DateAdd('H', 1, getDate.EventEndTime), "h:mm tt")#>
Resources:

Browser   CCBot/2.0 (https://commoncrawl.org/faq/)
Remote Address   54.81.150.27
Referrer  
Date/Time   24-Sep-18 02:32 AM
Stack Trace
at cfaddICal2ecfm1787875151.runPage(D:/inetpub/wwwroot/2012.siouxfallsevents.com/addICal.cfm:11) 

coldfusion.runtime.CFPage$InvalidDateException: Date value passed to date function DateAdd is unspecified or invalid.
	at coldfusion.runtime.CFPage.DateAdd(CFPage.java:1647)
	at cfaddICal2ecfm1787875151.runPage(D:\inetpub\wwwroot\2012.siouxfallsevents.com\addICal.cfm:11)
	at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:251)
	at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:737)
	at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:573)
	at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65)
	at coldfusion.filter.IpFilter.invoke(IpFilter.java:45)
	at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:505)
	at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:43)
	at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
	at coldfusion.filter.PathFilter.invoke(PathFilter.java:153)
	at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:94)
	at coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:78)
	at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
	at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
	at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:60)
	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:230)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	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:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:363)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:507)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)