EADR Error Code

EADR occurs when the GPIB interface is CIC and is not properly addressing itself before read and write calls. This error is usually associated with board-level calls.

EADR is also returned by the function ibgts when the shadow-handshake feature is requested and the GPIB ATN line is already unasserted. In this case, the shadow handshake is not possible and the error is returned to notify you of that fact.

Solutions

Make sure that the GPIB interface is addressed correctly before calling ibrd, ibwrt, RcvRespMsg, or SendDataBytes.

Avoid calling ibgts except immediately after an ibcmd call. (ibcmd causes ATN to be asserted.)

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