Hello Dikshita, > +#define HFI_SESSION_ERROR_BEGIN 0x04000000 > +#define HFI_ERROR_UNKNOWN_SESSION 0x04000001 > +#define HFI_ERROR_MAX_SESSIONS 0x04000002 > +#define HFI_ERROR_FATAL 0x04000003 > +#define HFI_ERROR_INVALID_STATE 0x04000004 > +#define HFI_ERROR_INSUFFICIENT_RESOURCES 0x04000005 > +#define HFI_ERROR_BUFFER_NOT_SET 0x04000006 > +#define HFI_SESSION_ERROR_END 0x04FFFFFF I am running this set on x1e. During tests with fluster I often see error code 0x04000008 [ 103.787979] qcom-iris aa00000.video-codec: session error received 0x4000008: unknown Seems worthwhile to add this one, and maybe other missing error codes as well, here and to iris_hfi_gen2_handle_session_error() below. regards Stefan Schmidt