Parameter Field Value returns "no records"

Question

I am using Crystal 11 and am new to Crystal but not to other Reportwriters.  I have a Crystal report that has 2 parameter fields, one is "Enter Date" that prompts for the start and end date, the other "Select Items" prompts for the supply Item Numbers to be included in the report.  In the "Edit Parameter: Select Items:" edit/create parameter dialog, the Select Item parameter has "Allow Multiple values" and "Allow discrete values" set to true. The report runs fine and returns any items entered in the "Select Items" prompt that has usage during the start & end date.  My problem is ... if the entered Item Number for the Select Items parameter returns no records, I cannot report that Item Number as having zero usage.  I cannot find a way at the time of report running to identify and report the "not found" items.  I would also like to report the Start and End Dates parameters requested, but cannot, the Enter Date parameter returns an empty parameter field across the whole report.  I'm sure other users have had this problem of reporting the requested parameter values.   Need assistance.  

Answer 1

Jeff's answer is one way to do it.  There are others:
If you want the items with no data interspersed with the other items (say, in item number order), then you'd change the report to use your item master table and do a left join from that to the usage data.  If a field from the usage table is null, then there was no usage, and you can condition a message based on that.
Or, if your parameter selects item numbers without some type of "ALL" option, then you can use arrays to keep track of which if the selected items printed.  Then in the report footer, compare the list of items reported to the parameter items, and show which item numbers had no usage.  (This might run a tad faster than the separate subreport that Jeff suggested - but maybe not...)
HTH,
Carl