Missing argument
You called a member sub or function of a product class and omitted one or more of the arguments that it expected. For example, assume a product class Walden that has a member sub Move that has two integer parameters:
Dim varV As Variant
Set varV = New Walden("ABC")
varV.Move 5 ' Illegal: Walden's Move method has two
' parameters, not one.
Supply the required number of arguments in the call, or remove the calling statement.