The Layer 1 API reserves the error code range 1000 to 1999. These constants define integer (32-bit) values that will be returned by the API functions to indicate either SUCCESS or an error code indicating why the function failed. The Layer 0 codes can be found in the AltaAPI Users Manual, page 126 (pdf page 145). The codes can also be found in the distributed “C” header file ADT_L1.h. The AltaAPI Users Manual and the Level 1 header file ADT_L1.h are included in the distribution CD for the API as well as available via the login section on the Alta Data Web site (https://www.altadt.com/login/).
