The Banner Output Search Pattern field is a Java regular expression field so the correct Java expression is required when entering values.
For example, the following are files that exist in the output directory:
123_file_nosa
file_123456.log
file_nosa.bad
file_nosa_input.txt
file_nosa.log
What is acceptable Java expression value that will register only output whose filename begin with the string 'file'?
In the list above, this is last 4 files but not the first file.
The correct Java expression value to register only output whose filename that begins with the string "file" is:
\b(?=\w)file.*
External sites do exist that will allow the testing of Java expression values if the above does not meet your requirements.