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I would like to do a simple calculation using VB script or Python. Here is a screenshot of my field calculator which continuously seems to run into errors. Basically for the SITE CLASS field I would like to assign all the ST as "Optimal", all the WT as "Subsuitable" and all the CT as "Unsuitable".enter image description here

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    Can you edit your post to include all the text in the Pre-Logic Script Code box? Right now it's getting cut off, so it is hard to see what you are currently doing. Commented Sep 8, 2021 at 12:58
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    (You should always try to add the code as text instead of screenshots of it, see: stackoverflow.com/help/minimal-reproducible-example)
    – Bera
    Commented Sep 8, 2021 at 13:21

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I think you are mixing SQL, VB and python syntax. Use python parser and:

Pre-Logic:

def reclass(siteclass):
    if 'ST' in siteclass:
        val = "Optimal"
    elif 'WT' in siteclass:
        val = "SubSuitable"
    else:
        val = "Unsuitable"
    return val

Call with

MACSITE_CL=

reclass(!SITE_CLASS!)
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