The default record format truncates reads if X'0A' occurs within binary data, such as in an integer or multibyte character field.

The leading record length is too small because it does not count the record terminator bytes. The first record can be read with variable type VBP2, but the record boundary is not correct for the second and subsequent records.

A data map with access method type USER specifies parameters for the file name, size of the length integer, and number of bytes to strip from the end of each record.

The user access method library reads the file, gets the length from the first two bytes, removes the specified number of bytes from the end of the record, and writes the record with a length that matches the actual size of the record according to the variable type VBP2.