August 6, 2026 - ONNX block in Analytics Builder now requires file extension in model name

Change Log Analytics
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Context

Change Type: API change
Product area: Analytics
Component: Streaming Analytics
Deployed at: eu.latest.cumulocity.com, apj.cumulocity.com, jp.cumulocity.com, cumulocity.com, us.cumulocity.com

Technical details

Build artifact: apama-in-c8y (27.180.0)
Internal ID: PAB-5326

Description

The ONNX block (Public Preview) in Analytics Builder now supports models uploaded to the Cumulocity files repository as a standalone .onnx file. Previously, the block only supported models packaged inside a .zip archive.

The ONNX model name parameter must now include an explicit .onnx or .zip file extension:

  • <modelName>.onnx looks for a standalone <modelName>.onnx file.
  • <modelName>.zip extracts the archive and looks for <modelName>.onnx inside it.

Previously, <modelName>, <modelName>.onnx, and <modelName>.zip were always resolved by extracting a <modelName>.zip archive and looking for <modelName>.onnx inside.

Important
This is a breaking change for existing models that omit the file extension, or that use a .onnx extension to extract a model from a .zip file uploaded to the files repository. To migrate, ensure the file extension used in your Analytics Builder model matches the type of file you have uploaded.