Why iCaptureSession->waitForIdle() return 11?

i want to restart my sensor by libargus,
the function iCaptureSession->waitForIdle() return 11.
i check the enum Status, but not value 11 exist

It’s nverror as below. Could be condition wait update timeout failed.

NVERROR(OverFlow,                           0x00000011, "Resource is full no more allocation possible")