can't be pull in port#2 in combine object

Hi.

I can't solve the problem not to pull the specific flowitem from port#2 in combine objects.

Five combiners are connected in straight line and one queue provides the sub flowitem to the input port#2 of each combiner.

The queue creates the five type items in random.

Itemtype #1 should be pulled in the first combiner and #2 item be pulled to the second combiner .....

The first combiner do it well but the flow item stop before the second combiner.

I attach the model.

I want to know the reason.

I need your help.

I think the reason is the order of Items in your Queue. Even setting the send to port option in the Queue to your logic doesn´t help.
What if you set some more Queues for every Itemtype, and this way every combiner?

Hello Syseo,

Try to deselect the pull requirement of the combiners and choose the 'By Expression' option on the 'Send to port' option of your queue, i think this will solve your problem.

Esther

Hi,

You can do what Ester i suggesting.

If you want to use Pull on the combiner you need to have Pull From Port set to Any Port otherwise the Tote will never go to next Combiner.
Then you should have following code in Pull Requirement

if (port==2)
    return getitemtype(item) == type;
else
    return 1;

I have done changes to your model, see attached model.

Lars-Olof

Hello syseo,

the pull strategy works on all items going in the combiner. Therefore Pull from Port is set to any port or return 0;
you can choose in Pull Requirement which item is accepted. But you receive two items: one from port two, which should be of a specific itemtype and one from port one, which has no condition.
eg Pull Requirement:

if (port == 2)
return getitemtype(item == 2); // change the specific itemtype
else return 1;

Jörg