| Condition | Error Code | Error Message |
|---|---|---|
| FirstDate contains invalid values. | -11 | Variable $VarName has invalid value $Value. |
| SecondDate contains invalid values. | -11 | Variable $VarName has invalid value $Value. |
| FirstDate is empty. | -12 | Variable $VarName has empty value. |
| SecondDate is empty. | -12 | Variable $VarName has empty value. |