Item To Cproject Object Link

Hello Friends,

                   When searching in here we found out the basic object link for costing rollup is 0RPMFIPROJECT. When we manually create object links between item and cproject it is working fine.But, we want to automatically create object link between Item and Cproject when we create item from project using Create Project on Saving.Is our understanding is proper? Or is there any other configuration is to be done for creating the Automatic Object link between item and Cproject ?

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Thanks,

Alex