Error "Source file A.clw not found" traced to ICON('A')

Someone yesterday got new error “Source file A.clw not found” when building and was unable to solve.

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This is similar to a previous post " Error : format.clw not found" that had no solution posted:

Developer only worked on one procedure in that APP and fortunately recalled the Window Previewer showed an error. I love a good Previewer puzzle so I tried it and saw below message:

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The Preview shows with the below Caution icon that makes it obvious:

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Traced that down to the below code with ICON('A')

Which was accidentally entered in the button properties:

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So in the case of a “Source file XXXX.clw not found” error try searching source for ('XXXX'). I tested with IMAGE('A') and received the same error about A.CLW not found. Prior Format.CLW post suggested search for Module(‘X’) could be the problem so that fits the search for ('X'). I would also try doing a Window Preview on the recently modified procedure Windows.

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