Why won the data I used in DevCan versions 4.x work with version 5.1 or later?
Each record DevCan reads from the database file is associated with an age group. In earlier versions of DevCan, this age group was always five years. The format for determining which age group belonged to a particular record was through an index. An index of 1 indicated the record was for ages 0 to 5, an index of 2 for 5 to 10, etc. Beginning with DevCan 5.0, age groups are not restricted solely to five-year intervals. The value used for a particular record is now the actual age at the start of the interval referred to by that record. A record with the age value of 1 indicates the record applies to the interval starting at age 1. The upper end of the interval is determined by the start age of the next record. For example, consecutive records with start ages 0, 10, 25, 50 describe a dataset where the first record is from the interval 0 to 10, the second from 10 to 25, the third from 25 to 50, and the last refers to ages 50+. A conversion utility was designed to change databases from the
