cfspreadsheet causing variable undefined error - excel

Question

I'm attempting to read a spreadsheet that has predefined charts on multiple tabs using cfspreadsheet, but when it comes to processing the data, I get variable is undefined.
I've used the example from Adobe - http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WSc3ff6d0ea77859461172e0811cbec17cba-7f87.html
I've also looked at other examples, but those examples use a combination of cfspreadsheet and poi or java and I would prefer to only use cfspreadsheet if possible. Any idea looking at my code below where the problem is coming from? Thanks.
<cfcontent type="application/vnd.ms-excel" reset="Yes">
<cfquery name="GetData" datasource="#request.dsn#">
SELECT *
FROM v_Occurrences
</cfquery>
<cfset strFileName = "OccurrenceData" & "#now().getTime()#" & "#UserID#">
<!---
<cfdump var="#GetData#">
--->
<cfset filepath = "file:///...OccurenceData.xls">
<!--- Write the two sheets to a single file --->
<cfspreadsheet
action ="read"
columnnames = "Occurence_Date,Full_Name_Client"
columns = "2"
excludeHeaderRow = "false"
headerrow = "1"
query="GetData"
rows = "2"
src ="#filepath#">
<cfscript>
OccurrenceData = SpreadsheetNew("Data");
Month = SpreadsheetNew("Month");
Person = SpreadsheetNew("Person");
SpreadsheetAddRows(occurrencedata,getdata);
</cfscript>
<!--- Write the two sheets to a single file --->
<cfspreadsheet
action="write"
filename="#filepath#"
name="OccurrenceData"
overwrite="true"
sheetname="Data" >
<cfspreadsheet
action="Update"
filename="#filepath#"
name="Month"
sheetname="Month">
<cfspreadsheet
action="Update"
filename="#filepath#"
name="Person"
sheetname="Person" >
<cfspreadsheet
action="read"
src="#filepath#"
sheetname="occurrencedata"
query="GetData">
Here's where the error occurs: variable Occurrence_Data is undefined
<cfscript>
SpreadsheetAddRow(OccurrenceData,"Date,Name",1,1);
SpreadsheetAddRow(OccurrenceData,
"#Dateformat(Occurrence_Date,'mm/dd/yyyy')#,#Full_Name_Client#",
2,1,true);
</cfscript>
<cfspreadsheet
action="write"
autosize="true"
filename="#strFileName#.xls"
overwrite="true"
password="password"
query="GetData"
sheetname="Data" >

Answer 1

Problem number 1. This is probably doing more harm than good.
<cfcontent type="application/vnd.ms-excel" reset="Yes">
Problem number 2. If you want to write two sheets to a single file, you don't do this:
OccurrenceData = SpreadsheetNew("Data");
Month = SpreadsheetNew("Month");
You do something like this:
OccurrenceData = SpreadsheetNew("Data");
// do stuff with this sheet
SpreadsheetCreateSheet(OccurrenceData, "Month");
SpreadSheetSetActiveSheetNumber(OccurrenceData, 2);
// do stuff with this sheet
SpreadSheetWrite(OccurrenceData, whateverYourFileNameIs);
I also suggest that you do one thing at a time. Write a bit of code, run it, and look at the results. Then add a bit more code, run it, and look at the results. This will help you isolate the code that causes the error.