Invalid Tree Item Type for Operation

Hva betyr TSM_E_INVALIDITEMTYPE ?

One or both of the specified tree items are not valid for the attempted operation (0x98510002). For LinkVariables() or UnlinkVariables(), this means one or both tree items are not of a variable type, preventing linkage operations.

• Attempted to perform an operation on an item with an incompatible data type.
• Trying to write a value to a read-only TwinCAT variable.
• Interfacing with a sensor or actuator that expects a different communication protocol.

Klikk på steg for å spore fremgangen.

1. 1

   Verify that bstrV1 and bstrV2 arguments refer specifically to variables, not other TwinCAT configuration items.

2. 2

   Check the ItemType property of the identified tree items to ensure they are recognized as a variable type.

3. 3

   Adjust the automation script to target correct variable paths for linking or unlinking.