Hello @Igor-Lobato, nice to Musicoin you!
I haven’t used Bittrex till now, but I remember other Musicoiners have reported difficulties in handling it, like here:
@Igor-Lobato what version of the wallet are you using? the latest version is 1.5 but its missing some text fields… so you might use the 1.01 version
Post the tx hash
I got it!! It was missing the address of the home wallet.