WARN12-Value parameters that are possibly set (ref/set by unknown subprogram)
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Value parameters that are possibly set (ref/set by unknown subprogram) (WARN12)
This is a list of all value parameters that are set in the subprogram they belong to. They are referenced in unknown fashion, and the parser cannot determine whether they are set or just referenced in these locations. Although this is permitted by the compiler, it may not be what you intended. If your intention is to really change the variable, use the var directive instead.