3655912 - Error 'Document framework is not active for 'PreliminaryBillingDocument'' when uploading attachments using API_CV_ATTACHMENT_SRV in SAP S/4HANA Cloud Public Edition

• Error 'Document framework is not active for 'PreliminaryBillingDocument'' when uploading attachments using API_CV_ATTACHMENT_SRV in SAP S/4HANA Cloud Public Edition.
• Error message: "Document framework is not active for 'PreliminaryBillingDocument'" When using API_CV_ATTACHMENT_SRV .
• API API_CV_ATTACHMENT_SRV and Entity AttachmentContentSet with POST fails with Exception CX_ODATA_CV_ATTACH_EXCEPTION.

•  SAP S/4HANA Cloud Public Edition
•  External Billing

1. Activate Harmonized Document Management (HDM) for billing process documents as outlined in the resource 'Harmonized Document Management for Attachments in Billing Process Documents'
2. Attempt to call the API API_CV_ATTACHMENT_SRV and Entity AttachmentContentSet in a POST request with BusinessObjectTypeName: VBRK
3. Error code: CX_ODATA_CV_ATTACH_EXCEPTION "Document framework is not active for 'PreliminaryBillingDocument'" is returned by the API

The communication scenario SAP_COM_0120 is not assigned to the communication user used to call the API API_CV_ATTACHMENT_SRV 

1. Assign the communication scenario SAP_COM_0120 to the communication user.
2. Follow the setup instructions for the External Billing (1Z6) scope item to ensure proper configuration.

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