Enqueue Element

[mfpktr]

Hi All,

I am Using Message Queue for Implementing my Project.

Inside an event structure, enqueuing message to the queue. Message is selected depending upon a selection ring menu. a Variant also there, so a cluster object is used to cluster variant and string and given to the queue.

when i executing the vi, with default ring menu, its working properly. but when i change the ring menu i am getting an error. Please see the attachment.

Anybody Please Comment on this issue.

Regards,

mfp.

[H_SH]

Hello mfp,

i don't think it is error, it is notification .. pobably in your event structure you are selecting filter event having red arrow in mark ..

BR, HS

[mfpktr]

Hi,

Thanks for the quick reply.

So What shall i do to remove that filtering?

Regards,

mfp.

[H_SH]

If you don't want filter events select the Notify events having green arrow mark .. Once you add events u get option to select the events .. few are having red arrow mark termed as filter events and rest with green arrow mark termed as notify events .. so select the green arrow mark events..

BR, HS

[mfpktr]

Its already in the green arrow category, "Value Change".

Error Input to the Enqueue Element is not having any error, but output is showing the following error message in the probe window.

Please find the attachment.

Regards,

mfp.

[TCPlomp]

Without any code it will be very hard to help you.

Please post your code.

Ton

[H_SH]

please post the screenshot of VI portion creating error..

[mfpktr]

Thanks alot for the reply.

Please find the attachment for the snapshot.

Regards,

mfp.

[TCPlomp · Accepted solution]

You get an error 1 on the 'enqueu element' because you use an invalid queue reference. This is caused because you use 'use default if unwired' on the output of the event structure. In one (or more) of your event structures you don't feed a valid queue reference into this tunnel. LabVIEW will then output a default (NULL) queue. Since you use a shift register in a next iteration you will use that invalid reference.

There are two solutions:

1. Right click on the tunnel and deselect 'use default if unwired' and feed all queueu references through
2. Don't use a shift register, I think it's unlikely that you change to another queue during the runnning of this VI.

Ton

[mfpktr]

Hi Ton,

Thank a lot for the support.

I Could able to solve the issue with your help.

Thanks.

Regards,

mfp.