Eric - Thanks for the help - it works fine.

>You need to close the recordset returned by the command:
>

DataEnvironment1.rsCommand1.close

>
>>The following code passes a parameter to a Data Report and runs the report.
>>
>>Private Sub Command1_Click()
>> ' Pass datetime stamp to Data Report
>> RptKey = Data1.Recordset.Fields("datetime")
>> DataEnvironment1.Command1 RptKey
>> DataReport1.Show
>>End Sub
>>
>>When I run the above report the first time, it works fine. After running it twice, I receive the following error:
>>
>> Run-Time error 3705
>>
>> Operation is not allowed when the object is open
>>
>>The debugger highlights the DataEnvironment1 line as the error line.
>>I am new to Visual Basic - any help would be appreciated.