Central contract for Service item

Dears,

Creating a central contract for service item in SAP SRM and same is transferred to ECC thr' PI.

1.The contract gets error as 'Enter EBELP' in ECC system.

2. Is that possible to create a central contract for serivce item directly without hierarchy structure in SAP SRM??

3. I have a document type CCTR-> linked to HIER_SRM

4. In othere scenerio, PR that comes from ECC has service Hierarchy structure, for that SC when i create a Contract using CCT2-> linked to HIER_SE.

kindly help me on the above scenerio..

Thanks.