License Key Not Available Wincc Logging For Runtime Advanced Work -

If troubleshooting confirms you genuinely lack the license, you have three purchasing routes.

Author: Automation Support Team Difficulty Level: Intermediate/Advanced Applies to: SIMATIC WinCC (TIA Portal) Runtime Advanced, WinCC Professional

Check physical licensing (if USB dongle)

Verify license service status

Confirm license presence and validity

Network license checks (if applicable)

Project vs. license reconciliation

Permissions and file integrity

Temporary workarounds

Escalation

This is a full license that includes 128, 512, 2048, or 4096 tags including full logging.

The background service that handles licensing may have hung or failed to start.

If you just need to test logging functionality without a full license: If troubleshooting confirms you genuinely lack the license,

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If you have ever stared at the alarm buffer of a Siemens HMI, wondering why your data logs look like Swiss cheese—full of holes—you might have met the silent killer of industrial data integrity: The missing license key.

Specifically, I’m talking about that dreaded moment you open your WinCC Runtime Advanced logging viewer, only to see a cryptic message: "License key not available. Logging disabled."

The machine is running. The PLC is cycling. But your production data? It’s falling into a black hole.

Here is the strange truth: You probably do own the license. But WinCC can’t find it. Let’s fix that. Check physical licensing (if USB dongle)