Standard OPC Error Codes

An OPC client can change the value of the OPC items exposed by the OPC server that have read/write access rights. The result of this write operation is translated in an error code that follows the OPC standard and finally forwarded from the OPC server to the OPC client requesting the operation.

The following list shows the possible error codes. The way the error code displays (text or number) depends on the OPC client in use.

Error Code (text or number)		Description
Text	Number	Description
`S_OK`	`0x00000000`	Write operation successful.
`OPC_E_BADTYPE` Or `DISP_E_TYPEMISMATCH`	`0xC0040004` Or `0x80020005`	The passed data type cannot be accepted for this item.
`OPC_E_BADRIGHTS`	`0xC0040006`	The item is not writeable.
`OPC_E_INVALIDHANDLE`	`0xC0040001`	The passed item handle is invalid.
`OPC_E_UNKNOWNITEMID`	`0xC0040007`	The item is no longer available in the server address space.
`OPC_E_RANGE`	`0xC004000B`	The value is out of range.
`E_FAIL`	`0x80004005`	Generic error: the function was unsuccessful.