A parent CFC uses implicit getters and setters with the property "data". A child CFC extends the parent with a defined setter for "data", which calls super.setData(). setData() is not found.

ChildTag.cfc

<!--- Child CFC, extends Parent --->
<cfcomponent displayName="ChildTag" output="false" accessors="true" extends="ParentTag">

	<cfproperty name="wibble" type="string" required="true" />

	<cffunction name="setData" output="false" returntype="void">
		<cfargument name="data" type="string" required="true" />
		<cfset super.setData(arguments.data & " via Child.") />
	</cffunction>

</cfcomponent>

ParentTag.cfc

<!--- Parent CFC --->
<cfcomponent displayname="ParentTag" output="false" accessors="true">

	<cfproperty name="data" type="string" required="true" />
	<cfproperty name="foo" type="string" required="true" />

</cfcomponent>

Test Child Error

The setData method was not found.

Either there are no methods with the specified method name and argument types or the setData method is overloaded with argument types that ColdFusion cannot decipher reliably. ColdFusion found 0 methods that match the provided arguments. If this is a Java object and you verified that the method exists, use the javacast function to reduce ambiguity.

The error occurred in /ChildTag.cfc: line 8

<cffunction name="setData" output="false" returntype="void">
  <cfargument name="data" type="string" required="true" />
  <cfset super.setData(arguments.data & " via Child.") />
</cffunction>

TestChild.cfm

<h2>Child Tag CFC</h2>

<cfset x = new ChildTag() />
<cfset x.setData("My Data.") />
<cfset x.setFoo("My Foo.") />
<cfset x.setWibble("My Wibble") />

<cfoutput>
Data: #x.getData()#
<br/>
Foo: #x.getFoo()#
<br />
Wibble: #x.getWibble()#
</cfoutput>

TestParent.cfm

<h2>Parent Tag CFC</h2>

<cfset x = new ParentTag() />
<cfset x.setData("My data.") />
<cfset x.setFoo("My Foo.") />

<cfoutput>
#x.getData()#
<br/>
#x.getFoo()#
</cfoutput>