Option Strict On requires that all method parameters have an 'As' clause
A method contains a parameter without an As clause. When Option Strict is on, every variable, property, procedure argument, and function return must be declared with an As clause to specify its data type; for example, Sub GetData(ByVal filter As String).
Error ID: BC30211
To correct this error
Check to see whether the As keyword is misspelled.
Supply an As clause for the declared variable, or turn Option Strict off.