For example String :-"1 - ACE-563-LTFU - Original Received Date - 2/24/2019 - 123-ABCLKDEFR"
Replace 1 with "ABC"
Return as :-"ABC - ACE-563-LTFU - Original Received Date - 2/24/2019 - 123-ABCLKDEFR"
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Find() function to find the start location of the first instance, if you want to replace the first 1 to appear in your text with "ABC". Then replace function to replace it with "ABC" Your code might well be replace(ri!yourText, find("1", ri!yourText), 1, "ABC") third parameter of replace being 1 because you only want to remove 1 character from the original text.