S7 0x0A (0x0A) — Item not available

The object referenced does not exist in the CPU — commonly a data block that was deleted or never downloaded.

Start free PROFINET / S7 → canonical

Diagnosis

When you hit this

The DB exists in the offline project but was never downloaded to the CPU.
Reading a DB that only exists in a different CPU of the same project.
Access to a block protected by know-how protection.

Resolution

How to fix it

Confirm the block is downloaded
Compare online and offline block lists. An offline-only block reads as 0x0A.
Check know-how protection
A protected block can be present but unreadable over S7 communication.

Normalization

What Forge does about it

This is a configuration or addressing mistake on the wire, upstream of anything Forge sees. Where Forge helps is the step after you fix it: once the point returns data, its vendor tag name maps to a canonical field automatically, so you do not also have to hand-maintain a name table for every point you just re-addressed.