Applicable Systems
TwinCAT NC
Symptoms
An invalid handle was used in an ADS operation. The handle may have been closed or never created.
Possible Causes
- Handle was already released or never allocated by the caller
- Memory corruption or data structure mismatch affecting the handle
Troubleshooting Steps
- Step 1: Check the calling code for correct handle values
Invalid handle value is identified - Step 2: Verify the data structure or protocol specification matches the expected format
Data structure matches specification
How to Reset
To reset: Correct the handle value in the calling application and retry the operation.
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Source: Beckhoff TwinCAT System Manual, Beckhoff Automation
Category: PLC & VFD
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