When you manualy edit a monitor or rule in the SCOM Authorin Console, maybee you have to edit the field @VariantType. The VariantType describes the type of the value that is returned.

The variant types are:

• Empty = 0
• Null = 1
• Short = 2
• Integer = 3
• Single = 4
• Double = 5
• Currency = 6
• Date = 7
• String = 8
• Object = 9
• Error = 10
• Boolean = 11
• Variant = 12
• DataObject = 13
• Decimal = 14
• Byte = 15
• Char = 16
• Long = 17