SAP Knowledge Base Article - Public

3548286 - Error: "426 Upgrade Required" in SAP Business ByDesign Communication Arrangement

Symptom

When testing the connection of a Web Service Communication Arrangement in ByD, the following error occurs:

  • Checking connection failed
  • Ping failed (KBA: 2926863)
  • Upgrade Required

When debugging the response of the call on SDK, the following error code appears:

  • Error code: 426

On Header Parameters, you will find on some the following value:

  • Value: "HTTP/1.x 426 Upgrade Required"

Where x equals anything other than 0.

Environment

  • SAP Business ByDesign
  • SAP Cloud Applications Studio

Reproducing the Issue

  1. Navigate to Application & User Management.
  2. Select Communication Arrangements.
  3. Choose the concerned Communication Arrangement.
  4. Click Edit -> Technical Data -> Edit Advanced Settings;
  5. Click on the concerned URL.
  6. Click Check Connection.

Cause

The error is caused by the use of an unsupported HTTP version.

SAP Business ByDesign only supports HTTP version 1.0.

Resolution

Confirm that the HTTP version being used is 1.0.

If a different version is being used, contact the service provider to adjust the HTTP version to 1.0.

Keywords

SAP Business ByDesign, Error 426, Upgrade Required, HTTPs version, SDK, Communication Arrangement, Check Connection, REST, Web Service. , KBA , AP-RC-BDS-WS , ByDesign Studio Web Services , Known Error

Product

SAP Business ByDesign all versions ; SAP Cloud Applications Studio all versions