3430167 - Client Import Process has already been started

You are using new client copy tool to do client transport.

After imported a client to target system, you executed SCC7N to apply the Client Copy post-processing procedure.

But it failed with error: 

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ERROR_MESSAGE;PHASE_INITIALIZE; WAIT_FOR_LAST_TASK; Client Import Process has already been started

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SAP Netweaver Release >=  754 SP02

Client Import Process has already been started, SCC7N , KBA , BC-CTS-CCO , Client Copy (For ByD issues select BC-TLM-CP) , Problem