The user can call a User Calc function at each Record Number, each Field Number
\\- the user should set up Variable Name = ‘User Calc’, and specify the User Calc name in the Constant Value field
\\- the Field Type must be defined with Char, Number or Date, the User Calc function on IMUC screen Return Value must match the values (Char, Number or Date) with the IMUC RET command to return the corresponding Char, Number or Date 
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For more information on User Calcs please refer to the [USERCALC] section.