On this topic:
NOTE: This information is referenced from ASC/X12 and may not be current. For the latest information please visit the ASC/X12 web site.
To report implementation errors in a data element or composite data structure and identify the location of the data element.
REF IDENTIFIER NAME REQ TYPE MIN/MAX NOTES 01 C030 Position in Segment M 02 725 Data Element Reference Number O N0 1/4 03 621 Implementation Data Element Syntax Error Code M ID 1/3 04 724 Copy of Bad Data Element O AN 1/99