# Version Compatibility Issue: HC 2025.6.1 Models Not Supported in HC 2025.6.0

**URL:** <https://forum.techsoft3d.com/t/version-compatibility-issue-hc-2025-6-1-models-not-supported-in-hc-2025-6-0/5182>\
**Category:** General\
**Tags:** code, webviewer, learn, how-to\
**Created:** [July 15, 2026, 3:43pm UTC](https://forum.techsoft3d.com/t/version-compatibility-issue-hc-2025-6-1-models-not-supported-in-hc-2025-6-0/5182 "2026-07-15T15:43:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![raja.r](https://avatars.discourse-cdn.com/v4/letter/r/a3d4f5/32.png) [@raja.r](https://forum.techsoft3d.com/u/raja.r)\
**Post date:** [July 15, 2026, 3:43pm UTC](https://forum.techsoft3d.com/t/version-compatibility-issue-hc-2025-6-1-models-not-supported-in-hc-2025-6-0/5182/1 "2026-07-15T15:43:05Z")

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We understand that **HOOPS Communicator 2025.6.1** is a Windows-only patch and that other platforms should continue using **2025.6.0**.

However, **2025.6.0** is no longer available for download on Windows, so Windows users are forced to use **2025.6.1**.

We are using the converter components from **HOOPS\_Communicator\_2025.6.1/authoring/converter** to generate `.scz` files. The issue is that `.scz` files generated with **2025.6.1** cannot be loaded by **2025.6.0** , as it reports that a higher version is not supported.

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**Author:** ![tino](https://avatars.discourse-cdn.com/v4/letter/t/9dc877/32.png) [@tino](https://forum.techsoft3d.com/u/tino)\
**Post date:** [July 16, 2026, 10:15pm UTC](https://forum.techsoft3d.com/t/version-compatibility-issue-hc-2025-6-1-models-not-supported-in-hc-2025-6-0/5182/2 "2026-07-16T22:15:14Z")

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Hello @raja.r,

You had also created a support ticket about this issue to which I’ve replied.

But to answer your question, the version of Converter must be \<= the version of Server and the Client (Web Viewer). And the Server and Client must be the same version.

Thanks,  
Tino