Please anybody can help?
I feel noob.
How can I create a Payment ID so I can be receive a XMR payment?
Is there a command to do that?
You don't have to create a Payment ID to receive an XMR payment. All you have to do is send to your XMR address.
Payment IDs are for exchanges so they know who deposited what (as all deposits go to the same address).
I understand your point, but I need one in order to be refounded by Bittrex.
First I send XMRx from Bittrex to Poloniex without payment ID.
Poloniex cleans his hands but Bittrex ask me for one payments ID so they can credited my lost moneros.
Excuse my poor english. It is not my native language.