Processor paused, no errors

I don´t know if this was the problem, but it seems to be solved.

I opened the SOPC Builder (by double-clicking it in quartus) and added a jtag component in it. re-generated the system, and recompiled the project in quartus.

Then, in NIOS II IDE, Run > Run..

In Target Connection Tab

NIOS II Terminal communication device: jtag_uart_0 <stdin/stdout/stderr>

This option was not avaiable before

Thanks and hope to help somebody in the future