This element does not specify a parameter for file transfer operations but an Assertion regarding the expected performance of file transfers. Assertions specify performance indicators that can be checked by a test suite.

The ReturnCode assertion specifies the exit code that is expected as the result of a file transfer. The ReturnCode is a numeric value between 0 and 255.

For YADE a ReturnCode value 0 signals a successful transfer, other values signal a failed transfer.