Abstract: Apparatus and methods for revising a field in computer program code. One method includes analyzing program code lines for the presence of the field and, if present, selectively revising the field from the first value range to a second value range. The field has a storage attribute of n bits, where n is at least eight bits; with the first value range being inclusively between zero and 99, and the second value range being inclusively between zero and 2.sup.n -1. The method can further include inserting an extended field representative of a base value into the program code, with the field being encoded as an offset value relative to the extended field. The method also can include creating a program code executable on a computer from the revised computer program code.