Invalid decimal data

  Explanation: A numeric data-item declared as USAGE IS DISPLAY, or
  with an implied declaration of USAGE IS DISPLAY, contains characters
  that are not digits or the sign position does not contain a valid sign
  representation.

  User Action:  You must determine how invalid characters are being
  stored in the variable.  Some possible reasons why this can occur
  are as follows:

      a. The variable in question is a parameter in a CALL statement
         and the called routine treats the variable as an alphanumeric
         field.

      b. The variable in question participates in a REDEFINES operation
         with an alphanumeric variable.

      c. The variable is defined as an element of a record, and
         alphanumeric data is moved to a group item that contains that
         variable.

  If the invalid data is caused by numeric data-items that contain
  leading blank characters instead of leading zeros, recompile the
  program specifying /CONVERT=LEADING_BLANKS.