What this means is you have a stored procedure Ship_Update and inside this stored procedure there is a query that references the function CurrentUser. For example something like:
select * from table where user=CurrentUser()
This function is not supported by the Microsoft Access driver. Note that many
VBA functions like CurrentUser() that work inside a Microsoft Access SQL statement do not work when you query the same Microsoft Access database using ODBC, this is a limitation of the ODBC driver.