ZeroMQ Dealer-REP Socket Combination Labview Example Code

[Sandhya Lakshmi]

Hi,
I am trying to implement a ZeroMQ Dealer-REP Socket Combination,i.e. I am trying to Eliminate Req and place Dealer to send messages Asynchronously and a REP to get the sent message.(See the Attached Images For Reference ),But I am not able to achieve it as I read in the guide that the Dealer need some Empty flags.I am not sure how to make it and not sure whatever I am doing is also correct !
Running this does not give any message out
It would be good if you can provide me an example for the combination I need and help me to get it through.
Thanks in Advance,
Sandhya

[Martijn Jasperse]

Hi Sandhya,
When using the DEALER/ROUTER paradigms, you need to use multi-part messages. I recommend using the multi-part VIs instead of using the "more" option manually. The attached example shows the simple version where there is only one attached REP socket.

Cheers,
Martijn

[Sandhya Lakshmi]

Hi Martijn,

Thanks for the reply.I already found out that and code is working fine now..I gotta another doubt now : You can see the Error which I get in the attached file.Can you tell me why I am getting this Error ,any inputs appreciated.

Thanks,
Sandhya

[Martijn Jasperse]

You can find the error code values and descriptions in zmq-errors.txt. The error value shown means

EFSM: Operation cannot be accomplished in current state

This is common when using strict socket types - particularly REQ and REP, which must alternate between send and receive operations. REP cannot simply receive, it must reply.

EFSM typically indicates that a different socket type is applicable to your intended design pattern. ROUTER is a simple replacement, but perhaps PUB/SUB is more applicable if the information flow is unidirection.

Cheers,
Martijn

[Sandhya Lakshmi]

Thank you for the response Martijn. I am using DEALER-REP Socket Combination since I am not concerned about the reply message. Could you suggest me some solution to overcome this Error ?