While creating Service Requisition from Ariba B&I to SAP ECC, the below error is thrown from SAP:

No instance of object type Purchase Requisition has been created / Maintain Services or Limits for Item xxx

Service Procurement related Business Functions and SAP Notes are not implemented.

Review and implement the following SAP Notes as needed:

1914440 -BAPI_PR_CREATE/BAPI_PR_CHANGE: account assignment errors

1947235-BAPI: Decimal not considered for the creation of purchase requisition

1978487 -BAPI: SE 181 issued during purchase requisition change using bapi_pr_change

2003042-BAPI: SE601 issued during purchase requisition change

2010358-SPPR: Decimal value of the currency not considered for the display on limit

2079845-bapi_pr_create: G/L Account is not determined

2195857 -SPPR: Multiple issues during the purchase requisition create/change

For service orders, ensure that the purchase order scenario is integrated successfully.

Please refer to How to activate Business Functions for more details regarding this.

SAP Business Network for Procurement & Supply Chain
SAP Integration Suite Managed Gateway > Managed Gateway for Business Network SCC > Managed Gateway for Buyer Business Network SCC