Complex object types cannot be converted to simple values.

The expression has requested a variable or an intermediate expression result as a simple value, however, the result cannot be converted to a simple value. Simple values are strings, numbers, boolean values, and date/time values. Queries, arrays, and COM objects are examples of complex values.

The most likely cause of the error is that you are trying to use a complex value as a simple one. For example, you might be trying to use a query variable in a <CFIF> tag. This was possible in ColdFusion 2.0 but creates an error in later versions.

The error occurred in E:\websites\www.eeicom.com\wwwroot\training\classess.cfm: line 19

17 : 
18 : <CFSET File = ExpandPath("desc\sw_#ClassList.SoftwareID#.txt")>
19 : <CFIF FileExists(File)>
20 :   <CFFILE ACTION="Read" FILE="#File#" VARIABLE="Description">
21 :   <CFOUTPUT>#Description#</CFOUTPUT>

Please try the following:

Check the ColdFusion documentation to verify that you are using the correct syntax.
Search the Knowledge Base to find a solution to your problem.

Browser	ColdFusion
Remote Address	192.168.10.69
Referrer
Date/Time	15-Aug-07 01:12 PM

Stack Trace

at cfclassess2ecfm1483439484.runPage(E:\websites\www.eeicom.com\wwwroot\training\classess.cfm:19)

coldfusion.runtime.CfJspPage$ComplexObjectException: Complex object types cannot be converted to simple values.
	at coldfusion.runtime.Cast._String(Cast.java:679)
	at cfclassess2ecfm1483439484.runPage(E:\websites\www.eeicom.com\wwwroot\training\classess.cfm:19)
	at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152)
	at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:343)
	at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65)
	at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:210)
	at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:51)
	at coldfusion.filter.PathFilter.invoke(PathFilter.java:86)
	at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:50)
	at coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:52)
	at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
	at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
	at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
	at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
	at coldfusion.CfmServlet.service(CfmServlet.java:105)
	at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:78)
	at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:91)
	at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
	at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:257)
	at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:527)
	at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:204)
	at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:349)
	at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:457)
	at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:295)
	at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)