Sensoray 817 - Manual (Page 4)

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All API’s functions return an error code. A non-zero value indicates an error. A brief
description of error codes could be found in
s817.h . It is strongly recommended to
always check this code at the application level and trap error conditions. This usually
simplifies troubleshooting and helps avoid severe application errors (crashes). When
reporting an error condition to Sensoray, please provide the API function that caused an
error and the value of the error code.