Fixed Width processing error messages

The Fixed Width Import/Export returns these messages with the given definition file errors:

Message	Error
Field name must be between A and CZ. Field: {0}	Field name is not between A and CZ, which are the only valid WBINT_IMPORT/WBINT_EXPORT fields.
One field's start/end indexes cannot overlap with other fields. Fields: {0} - {1}	The indices overlap each other. For example: S,298,307,EMP_VAL1; T,307,317,EMP_VAL2. This definition is not valid since the end index of S is the same as the start index of T.