An Automation License Manager connection failure is expected when attempting to transfer a WinCC Unified option license directly to a Unified Comfort Panel. For the documented MTP700 case, the transfer reports 16842752 (0x1010000) - Connection error, even though TIA Portal downloads and ProSave backups work. Those successful connections do not prove that panel-side license transfer is supported.
Identify the licensing limitation
WinCC Unified Comfort Panels do not support installing WinCC Unified option licenses on the device. The licensed functionality can therefore operate without a license transferred to the panel, but the license terms still require purchasing the appropriate license before using that functionality.
| Observed item | Engineering interpretation |
|---|---|
| Panel | MTP700 Unified Comfort Panel |
| Option license | WinCC Unified Audit Basis V18.0 |
| ALM result | 16842752 (0x1010000) - Connection error |
| TIA Portal V18 download | Works; confirms the engineering connection, not ALM transfer support |
| ProSave backup | Works; confirms backup communication, not option-license handling |
Resolve the transfer error
Do not treat the ALM error as evidence of a general network fault when TIA Portal and ProSave already communicate with the panel. The unsupported operation is the direct transfer of the option license to the Unified Comfort Panel.
- Stop retrying the panel-side transfer in Automation License Manager; the documented platform does not support that license placement.
- Purchase the WinCC Unified option license required for the audit functionality before using it.
- Retain the purchased license and its associated certificates as compliance records.
- Deliver the applicable licenses and certificates when the machine or software is transferred to the end customer.
Separate connectivity from license handling
TIA Portal program transfer, ProSave backup access, and Automation License Manager transfer are separate operations. A working download or backup path verifies that those services can reach the panel; it does not establish that the panel accepts a Unified option license. Reworking a proven network path will not add unsupported license handling.
Verify version-specific status
The evidence establishes the limitation for the V18.0 licensing case. It raises, but does not resolve, whether firmware V19.3 changes the behavior. A projected solution no earlier than V21 was expressed only as an expectation, not a confirmed release commitment. Before changing the compliance workflow for another firmware or software version, verify current support through Siemens product documentation or an official Siemens support channel.
FAQ
Why does ALM show error 16842752 on an MTP700?
The attempted WinCC Unified option-license transfer is not supported on the Unified Comfort Panel. Working TIA Portal downloads and ProSave backups indicate that the error does not necessarily represent a general panel connection failure.
Does WinCC Unified Audit Basis V18.0 work without transferring the license to the panel?
The functionality can operate without a license installed on the Unified Comfort Panel, but the license terms still require purchasing the appropriate option license before use.
What license records must be delivered with a Unified Comfort Panel project?
Deliver the appropriate purchased licenses and associated certificates to the end customer with the software or machine. Keep those records even though the option license cannot be transferred to the panel itself.