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Semantic Error (SEM1079): The data type of the expression ('...') is not 'ANY_INT'.

In a CASE statement (ST Code), the variable or expression to be evaluated must be of the data type ANY_INT (LINT, DINT, INT, SINT, ULINT, UDINT, UINT, USINT). In a worksheet, any other data type shall be evaluated instead at the underlined position. Enter an ANY_INT variable/expression to correct the statement.

Further Info
For information on the correct ST syntax refer to the topic "ST code objects".