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Kepware Knowledge Base: Solution

Receiving Attempt to add item '<item>' failed Error when Adding an I/O Register Tag Dynamically to the Server

Last Update: 11/7/2018

When adding I/O registers to be read from a modular Allen-Bradley SLC, the connected client receives errors in the KEPServerEX Event Log. If the client is an OPC client, it will receive error code "0xC0040007 - The item is no longer available in the server address space".

Possible Cause:
During device creation, the slots were not configured with the I/O card information (which validates register addresses during tag creation).

Open the device's Device Properties, and then configure the SLC's slots with the appropriate card configuration. All slots should be configured.

Related Protocols
Allen-Bradley Ethernet