Question Re: BAS Project creation issue using on premise system : Authentication issue in Technology Q&A

BAS Project creation issue using on premise system : Authentication issue

vander_vivo — Fri, 28 Aug 2026 09:40:55 GMT

Hi SAP Community,

I am facing an authentication issue in SAP Business Application Studio (BAS) while creating a new SAP Fiori application from an S/4HANA on-premise system connected through SAP Cloud Connector.

The strange part is that the connection itself is working correctly.

Current setup

SAP S/4HANA on-premise system
SAP Cloud Connector is connected and working
SAP BTP Trial account
SAP Business Application Studio
Fiori Tools
Node.js: v24.17.0
@SAP/generator-fiori: 1.31.1

What is working

The same backend system can be accessed successfully from the browser.

For example, the OData catalog service:

https://<virtual-host>:portno/sap/opu/odata/iwfnd/catalogservice;v=2/ServiceCollection

opens successfully and prompts for my ABAP user/password.

More importantly, in BAS → Service Center, I select the same BTP destination/system, and BAS successfully retrieves and displays the available OData services.

Is there a known issue or workaround for this specific Fiori generator authentication problem?
I would especially appreciate guidance on this issue ?

Thanks in Advance

Re: BAS Project creation issue using on premise system : Authentication issue

jlong — Mon, 07 Sep 2026 10:28:25 GMT

Hi, There was an outage on August 31 and September 1 that caused connectivity issues when using SAP Business Application Studio. The issue has since been addressed. If you are still experiencing connectivity problems, please run the following environment check. This will help narrow down the scope of the issue and provide additional information for troubleshooting: https://github.com/SAP-samples/fiori-tools-samples/blob/main/misc/destinations/README.md#environment-check

Re: BAS Project creation issue using on premise system : Authentication issue

Ulrich_Schmidt1 — Sat, 12 Sep 2026 10:34:21 GMT

Also, if the problem still persists, you could activate the traffic trace in the SCC. Then you can see, which credentials the SCC sends to the S/4HANA system, and what the precise error message returned by the S/4HANA system is. (User & pwd wrong, user locked, missing permissions, etc.)

Re: BAS Project creation issue using on premise system : Authentication issue

jlong — Mon, 14 Sep 2026 12:43:53 GMT

Details of how to enable and review the SCC logs https://github.com/SAP-samples/fiori-tools-samples/blob/main/misc/onpremise/connectivity.md#enable-cloud-connector-trace-logging