BASE/2020    Argument error (SET() function)

     Explanation:  CA-Clipper raises this error if a negative numeric
     value is passed to SET() during an attempt to set the following global
     state variables:

     _SET_DECIMALS      // SET DECIMALS TO xxx
     _SET_EPOCH         // SET EPOCH TO xxxx
     _SET_MARGIN        // SET MARGIN TO xx
     _SET_MESSAGE       // SET MESSAGE TO xx

     Action:  Change your code.  Do not pass negative values to SET().

     See Also:  COPY FILE command