Kevin,

Thank you. That did it.

Neil

>Neil,
>
>>The problem occurs when I attempt to wrap the 4 read-only Business Objects and their queries in a “!IsPostBack” construct.
>
>I think you want to do something like this instead:
>
>

>// Instantiate look-up (read-only) business objects		
>//register labwork bizobj
>this.oLabWork = (LabWork)this.RegisterBizObj(new LabWork());
>
>//register letterlog bizobj
>this.oLetterLog = (LetterLog)this.RegisterBizObj(new LetterLog());
>
>//register guarantor bizobj
>this.oGuarantor = (Guarantor)this.RegisterBizObj(new Guarantor());
>
>//register model bizobj
>this.oModel = (Model)this.RegisterBizObj(new Model());
>
>if (!IsPostBack)
>{
>    // populate look-up (read-only) datasets and persist across application
>    //  populate the LetterLog Dataset for this patient
>    Session["dsLetterLog"] = this.oLetterLog.GetLetterLogByptno(custid);
>						
>    // populate the LabWork DataSet for this patient
>    Session["dsLabWork"] = this.oLabWork.GetLabWorkBycustno(custid);
>
>    //  populate the Guarantor Dataset for this patient
>    Session["dsGuarantor"] = this.oGuarantor.GetGuarantorBycustno(custid);
>
>    //populate the Model Dataset for this patient
>    Session["dsModel"] = this.oModel.GetModelBycustno(custid);
>}
>

>
>If I understand what you're doing, you want your business objects to be instantiated and registered whether or not you're posting back or not.
>
>Regards,