Exception: "Invalid parameter type."

struct
Browser CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
DateTime {ts '2008-08-22 03:42:34'}
Diagnostics Invalid parameter type. The value cannot be converted to a numeric because it is not a simple value.Simple values are booleans, numbers, strings, and date-time values. <br>The error occurred on line 7.
GeneratedContent
HTTPReferer [empty string]
Mailto [empty string]
Message Invalid parameter type.
QueryString 404;http://www.charterhousing.co.uk/dld/1321.html
RemoteAddress 38.103.63.60
RootCause
struct
Detail The value cannot be converted to a numeric because it is not a simple value.Simple values are booleans, numbers, strings, and date-time values.
ErrNumber 0
Message Invalid parameter type.
StackTrace coldfusion.tagext.lang.ParamTag$InvalidParamTypeException: Invalid parameter type. at coldfusion.tagext.lang.ParamTag.doStartTag(ParamTag.java:178) at coldfusion.runtime.CfJspPage._emptyTag(CfJspPage.java:1915) at cfdownloadresource2ecfm1527097390.runPage(D:\CFusionMX\Diablo\Common\downloadresource.cfm:7) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152) at coldfusion.filter.CFVariablesScopeFilter.invoke(CFVariablesScopeFilter.java:63) at coldfusion.tagext.lang.ModuleTag.doStartTag(ModuleTag.java:255) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:1925) at cfdiablo_site2ecfm713383268.runPage(D:\CFusionMX\Diablo\CustomTags\diablo_site.cfm:159) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152) at coldfusion.filter.CFVariablesScopeFilter.invoke(CFVariablesScopeFilter.java:63) at coldfusion.tagext.lang.ModuleTag.doStartTag(ModuleTag.java:255) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:1925) at cfApplication2ecfm1926922450.runPage(D:\Inetpub\wwwroot\public\uk\co\charterhousing\Application.cfm:2) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:349) at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65) at coldfusion.filter.CfincludeFilter.include(CfincludeFilter.java:33) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:172) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:51) at coldfusion.filter.PathFilter.invoke(PathFilter.java:86) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:69) 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.filter.RequestThrottleFilter.invoke(RequestThrottleFilter.java:115) at coldfusion.CfmServlet.service(CfmServlet.java:107) 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:541) at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:204) at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:318) at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:426) at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:264) at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
TagContext
array
1
struct
COLUMN 0
ID CFPARAM
LINE 7
RAW_TRACE at cfdownloadresource2ecfm1527097390.runPage(D:\CFusionMX\Diablo\Common\downloadresource.cfm:7)
TEMPLATE D:\CFusionMX\Diablo\Common\downloadresource.cfm
TYPE CFML
2
struct
COLUMN 0
ID CFMODULE
LINE 159
RAW_TRACE at cfdiablo_site2ecfm713383268.runPage(D:\CFusionMX\Diablo\CustomTags\diablo_site.cfm:159)
TEMPLATE D:\CFusionMX\Diablo\CustomTags\diablo_site.cfm
TYPE CFML
3
struct
COLUMN 0
ID CFMODULE
LINE 2
RAW_TRACE at cfApplication2ecfm1926922450.runPage(D:\Inetpub\wwwroot\public\uk\co\charterhousing\Application.cfm:2)
TEMPLATE D:\Inetpub\wwwroot\public\uk\co\charterhousing\Application.cfm
TYPE CFML
Type Expression
detailMessage The value cannot be converted to a numeric because it is not a simple value.Simple values are booleans, numbers, strings, and date-time values.
StackTrace coldfusion.tagext.lang.ParamTag$InvalidParamTypeException: Invalid parameter type. at coldfusion.tagext.lang.ParamTag.doStartTag(ParamTag.java:178) at coldfusion.runtime.CfJspPage._emptyTag(CfJspPage.java:1915) at cfdownloadresource2ecfm1527097390.runPage(D:\CFusionMX\Diablo\Common\downloadresource.cfm:7) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152) at coldfusion.filter.CFVariablesScopeFilter.invoke(CFVariablesScopeFilter.java:63) at coldfusion.tagext.lang.ModuleTag.doStartTag(ModuleTag.java:255) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:1925) at cfdiablo_site2ecfm713383268.runPage(D:\CFusionMX\Diablo\CustomTags\diablo_site.cfm:159) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152) at coldfusion.filter.CFVariablesScopeFilter.invoke(CFVariablesScopeFilter.java:63) at coldfusion.tagext.lang.ModuleTag.doStartTag(ModuleTag.java:255) at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:1925) at cfApplication2ecfm1926922450.runPage(D:\Inetpub\wwwroot\public\uk\co\charterhousing\Application.cfm:2) at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:152) at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:349) at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65) at coldfusion.filter.CfincludeFilter.include(CfincludeFilter.java:33) at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:172) at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:51) at coldfusion.filter.PathFilter.invoke(PathFilter.java:86) at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:69) 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.filter.RequestThrottleFilter.invoke(RequestThrottleFilter.java:115) at coldfusion.CfmServlet.service(CfmServlet.java:107) 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:541) at jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:204) at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:318) at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:426) at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:264) at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
TagContext
array
1
struct
COLUMN 0
ID CFPARAM
LINE 7
RAW_TRACE at cfdownloadresource2ecfm1527097390.runPage(D:\CFusionMX\Diablo\Common\downloadresource.cfm:7)
TEMPLATE D:\CFusionMX\Diablo\Common\downloadresource.cfm
TYPE CFML
2
struct
COLUMN 0
ID CFMODULE
LINE 159
RAW_TRACE at cfdiablo_site2ecfm713383268.runPage(D:\CFusionMX\Diablo\CustomTags\diablo_site.cfm:159)
TEMPLATE D:\CFusionMX\Diablo\CustomTags\diablo_site.cfm
TYPE CFML
3
struct
COLUMN 0
ID CFMODULE
LINE 2
RAW_TRACE at cfApplication2ecfm1926922450.runPage(D:\Inetpub\wwwroot\public\uk\co\charterhousing\Application.cfm:2)
TEMPLATE D:\Inetpub\wwwroot\public\uk\co\charterhousing\Application.cfm
TYPE CFML
Template /404.cfm
Type coldfusion.runtime.CfErrorWrapper