Error Message on Flow Embedded in Visualforce Page

Question

I have a custom button that calls a visualforce page. In this VF page I embedded a flow in order to control the "finish location". I got the following error message:

unexpected token: ':'

An unexpected error has occurred. Your solution provider has been notified. (Flow__Interview)

Can you tell me why it happened and solve this? I added the VF and Apex code below.

VF Page:

<apex:page standardController="Lead" extensions="flowFinishContExt_Acct" tabStyle="Lead">
<!-- Checks for object accessibility -->
<apex:pageBlock rendered="{!$ObjectType.Lead.accessible}">
<flow:interview name="Deal_Registration_New" interview="{!FacLookupFlow}" buttonLocation="both" finishLocation="{!FinishPage}">
<apex:param name="VarLeadID" value="{!Lead.id}"/>
</flow:interview>
</apex:pageBlock>
</apex:page>

Apex Class:

  public class flowFinishContExt_Acct {
    private final Lead acct;
    //Uses Standard Lead Controller 
    public flowFinishContExt_Acct(ApexPages.StandardController stdController) {
    this.acct = (Lead)stdController.getRecord();
    }

//Calls referenced Flow below
public Flow.Interview.Deal_Registration_New FacLookupFlow {get; set;}
//Gets Id of variables below from flow
public String getaccountID() {
if (FacLookupFlow==null) return '';
else return FacLookupFlow.VarLeadID;
}
//Used for Flow finish location
public PageReference getFinishPage(){

return new PageReference('/' + getaccountID());

}
}

Answer 1

Salesforce have broken the <flow:interview> component in the run up the Winter '14 release.

They are aware of this but we have not been given a resolution ETA yet.