Charting on Printtime Formulas

Question

I have a report that contains a subreport and uses shared variables calculated WhilePrintingRecords. I tried charting the finished data but found that some of the fields do not appear in the Chart Expert. Then through this forum I found a Business Objects paper: cr9_charting_print_time.pdf. This paper explains why charting directly on print time formulas will not work. But it describes a workaround. My problem is that I have so far been unsuccessful in applying the workaround to my particular report.
I run into problems on page 5 of the paper. A new subreport called ChartSub has been creasted. The example is to enter the following Record Selection formula in the subreport: {Customer.Customer Name} in split({Pm-@OnChangeOf},"^").
The array OnChangeOf has been previously created. In my report it is simply the names of the months. The finished chart I want is a simple line chart with month names as the y axis and values as the x axis. But in my database I have no table tthat contains monthnames other than multiple records (the equivalent of "Customer" in the example).
It seems that I am able to create the workaround up to the point that I have two array formulas that contain the x axis and y axis data points. But I can't figure out how to create a chart from this.
I know this is not a simple question. But if anyone would like to dig up the article, I'd be glad to furnish additional details.
Many of my reports use printtime formulas and shared variables, and I really need to figure out how to chart this type of data.
Thank you,
Art

Answer 1

Thank you Jehanzeb.
Before I get to your specific questions, let me see if I can insert links to the three screenshots I wanted to show you in my previous posting. I used Photobucket as you suggested:
[Before Chart - Preview|http://i435.photobucket.com/albums/qq77/aschwalge/Charting1.png]
[Before Chart - Design|http://i435.photobucket.com/albums/qq77/aschwalge/Charting2.png]
[String Arrays|http://i435.photobucket.com/albums/qq77/aschwalge/Charting3.png]
Answering your specific questions:
Formula to calculate Total Cost ('MfgCost'), placed in GF #2c:
'MfgCost
WhilePrintingRecords
'From Matl subreport
Shared nMatlCost As Number
Global nProdCost As Number
Global nMfgCost As Number
nMfgCost = nProdCost + nMatlCost
Formula = nMfgCost
Formula which calculates the shared variable, which is placed in GF #2 of the Material subreport:
WhilePrintingRecords
Shared nMatlCost As Number
nMatlCost = Sum ({MatlUsageTran.Cost-Total-Material}, {MatlUsageTran.Posting-Period})
Formula = nMatlCost
The Material subreport is placed in GF #2b of the Main Report.
You are concerned that the Total Cost  may be bringing more than one value for each month. I believe it is only bringing in one value - I don't think this is the problem.
Does the Main Report and Subreport have the same record selection formula? Not quite, The only difference is in the inequality sign for Posting-Period:
Main Report:
{ProductionTran.System-ID} = {?Company}
and
{ProductionTran.Posting-Fiscal-Year} = {?Fiscal Year}
and
{ProductionTran.Posting-Period} <= {?Posting Period}
and
{ProductionTran.Work-Type-ID} = "RN"
and
{ProductionTran.Distribution-Type} <> "Distributed"
Material Subreport:
{MatlUsageTran.System-ID} = {?Pm-ProductionTran.System-ID}
and
{MatlUsageTran.Posting-Fiscal-Year} = {?Pm-ProductionTran.Posting-Fiscal-Year}
and
{MatlUsageTran.Posting-Period} = {?Pm-ProductionTran.Posting-Period}
and
{MatlUsageTran.Work-Type-ID} = "RN"
and
{MatlUsageTran.Distribution-Type} <> "Distributed"
"When you say, month number will be your X-Axis, providing you have set the report and formulas for 2007 only, it should show only 1-12 months of 2007 on the chart. However if the multiple records are getting pulled for each month, the chart would not be able to fit everything, hence I suspect it doesn't show the records on the graph. Are you sure, the records you pulling from main report are (one single total cost record for each month?)using sharedvars?"
I think the Total Cost number is unique, as discussed earlier. I think the problem is that there are multiple records for month number in ChartSub.  Although my string array strOnChangeOf has unique month numbers, in ChartSub I have the following record selection formula:
{ProductionTran.Posting-Fiscal-Year} = 2007
and
CStr({ProductionTran.Posting-Period}) in split ({?Pm-@OnChangeOf},"^"}
ProductionTran.Posting-Period has MANY records for each month number (posting-period). This seems to me to be the ONLY real difference between the BO article, where Customer.CustomerName is used for record selection in ChartSub.
Once again, thank you for your help!
Art