@v-bofeng-msft thank you for the help. Here's the result:
I changed the button in my Gallery OnSelect formula back to Select(Parent)
I replaced the Text input field in the Purchase_Order_Number_DataCard1 with a label (Label1).
I updated the Text formula for Label1 to be Gallery4.Selected.'PO Number'
I double checked my gallery datasource and it is pulling from 'FPC-Purchase Orders' and the reference to 'PO Number' is correct
I updated the the Update formula for Purchase_Order_Number_DataCard1 to be Label1.Text
I am getting the following error on Label1:
Issue
This rule creates a circular reference between properties, which is not allowed. A property cannot refence itself or other properties affected by its value.
Location:
Label1.text
I am getting the following error on Purchase Order Number_DataCard1:
Issue
This rule creates a circular reference between properties, which is not allowed. A property cannot refence itself or other properties affected by its value.
Location:
Purchase Order Number_DataCard1.Update
I thought I may have accidently used the 'Purchase Order Number' field in my 'FPC-Invoice' list on accident somewhere, but I've checked everywhere I know to look. All references are linked to my 'FPC-Purchase Order List' and the 'PO Number'. My gallery is filter by columns from my 'FPC Invoices' list 'School' and 'Vendor Name'. Could that be the problem?
Thank you for the assistance.