Microsoft Access - Combo box in subform base off masterform combo box

Question

I have a Masterform , which handles all the information header of a ReceivingReport . You must select a PO Number from a combo box, and fill out the necessaries information as well. Everything works fine up to this point.

My subform on the other hand works if I keep it very basic but I want my second combo box located in my subform ; which is base off the ID from the first combo box in the masterform to display only items from the PO Number ID .

I know my Query isn't working, since its not even displaying a record. But I can't seem to understand how to pull the information from the masterform combo box to use it correctly to retrieve the correct data .

As you can see in the query image, I was using this to retrieve the bound column PurchaseOrderID from the first combo box .

[Forms]![frm_addReceiveReportInformation].[Form]![cbo_PurchaseOrderID]

Answer 1

[Forms]![frm_addReceiveReportInformation].[Form]![cbo_PurchaseOrderID]

should be

[Forms]![frm_addReceiveReportInformation]![cbo_PurchaseOrderID]