Expression of Simple Type is Expected

Description

Expression of the Select Case statement has a type, which cannot be processed with this statement. An expression given in the Select Case statement should have one of the following types:

Boolean.
Char.
Currency.
DateTime.
Decimal.
Double.
Integer.
TimeSpan.
String.

Troubleshooting Tips

Check the type of expression specified in the Select Case statement. Probably, the expressions need to be cast to one of the above-mentioned types.

Example

Class TestClass: Object
    v: Variant;

    Sub Run;
    Begin
        Select Case v
        Case ...
        End Select;
    End Sub Run;

End Class TestClass;

When the specified code is compiled, the following error is displayed: Expression of simple type is expected. Variables of the Variant type cannot be used in the Select Case statement. To resolve the error, change the type of the "v" variable or explicitly convert it to a simple type.