I need to detect following error message
Error_in_Validating_Fields_Aggregated_Tax_Calc_and_Tax_Averaging_cannot_be_combined_on_the_same_Instance_
to make sure I'm getting correct message I have to make sure the error string contains
"Error", "Aggregate", "Tax_Averag ", "combin " in any order
How do you do it using non-native reguler expressions