EWM and ECC integration,Unable to create inbound delivery in EWM

Hi Sap Gurus,

I am trying to create inbound delivery notification after EWM-ECC integration.I have followed all steps as per best practices.When i try to create inbound delivery it gives message a message"Inbound delivery has been created and distributed to WMS"

When i check inbound qque in SMQ2 it shows "Sys Fail" status.

I ve checked the SLG1 and found following errors.

• Could Not create header data for delivery 0180000102,system ERP_001
• Error during mapping:Material 103071 does not exist
• Cannot create item 00010 of delivery 0180000102 from system ERP_001
• No Unique partner found for plant 1000

I request you to help me in this regard.Please note i am a beginner in EWM.