Problem is, some of the numeric fields are stored in the dataset in numeric formats, like integer or packed. If you assign a non-numeric character to a numeric field, you have invalid data. So the first thing you need to know is how to get Suprtool to accept character-type numeric data as a numeric field.
Numeric fields can have any one of a number of different formats.
Leading blanks are OK, but trailing blanks are not. Lets say, for example, that you know that the first 4 bytes of a record represent invoice-status.