I have the below function that is throwing up an error I do not understand how to solve.
SetProperty(DataCardValue20_4.Text, LookUp(REQLINES,ITEM=Value(DataCardValue30_4.Text), DESCRIPTION))

The intent of this function is to fill OnSelect of a button the DataCardValue20_4.text with DESCRIPTION from REQLINES data source if DataCardValue30_4.text matches an ITEM number from the same REQLINES table. Basically trying to create an autofill button for my form if the data already resides on REQLINES table, where ITEM is my comparison value to create the data match.
What function should I be using instead of SetProperty, or others adjustments to enable this lookup & autofill?
Thanks in advance for any advice!