Hi S,
Mapping fields in BP can be a challenge, depending what you're trying to map. Java programs and Internet sites can be quite tough. As Taha rightfully points out in his earlier comment, you need to uniquely map the field you are working with.
If you have the opportunity to check out 'Dave the RPA guy' videos on YouTube, I recall there are a few vids on an 'RPA Challenge' with different RPA products (including BP) that demonstrate what you are looking for. Otherwise, Dave's vids are always great as a starting point to get into something new or difficult.
Kudos Dave!
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Happy coding!
Paul
Sweden
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Happy coding!
Paul, Sweden
(By all means, do not mark this as the best answer!)