Return value – National Instruments CAN 372139B-01 User Manual
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Chapter 6
Automotive Diagnostic Command Set API for C
© National Instruments Corporation
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Automotive Diagnostic Command Set User Manual
Return Value
The return value indicates the function call status as a signed 32-bit integer. Zero means the
function executed successfully. A negative value specifies an error, which means the function
did not perform the expected behavior. A positive value specifies a warning, which means the
function performed as expected, but a condition arose that may require attention.
Use the
function to obtain a descriptive string for the return value.