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Why am I getting "inadmissible input" for regex in "finds" expression?
i.e. a regex looking for four numbers from 1-3 digits, separated by periods. However, it gives me the following error message: Error: Inadmissible input at "". It has an arrow pointing at the opening quotes in the regex expression. What am I doing wrong? Why is the opening quotes of the regex producing an error? I've looked at several questions in RapidMiner Community with examples of regex expressions, and they look like they're formatted the same way mine is.
My xml details are as follows. (Please don't ask for the entire process xml. It's lengthy, and sensitive.)
Thanks for any help!! I'm getting frustrated with repeated roadblocks in simple attribute extraction, before I even get to the modeling.