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I found a thread regarding this from 11 years ago, but couldn't find anything else so thought it may be best to check if the newer versions of FM have a solution to this problem. Is there any function or custom function that would allow me to check if the value in a field is numeric? I have a field that is supposed to be only numeric (primarily only positive integers) however occasionally there are entries like '1 + 4' or '10 + 2'. I'd like to enter the contents of this field into another field, but only with the entries that are numeric only. Any thoughts? Really appreciate any help.