picture viewer

Your picture does show a DMA, but that one seems to be correctly connected.

It seems you have a DMA further down?

The error tells you that the DMA controller sees your SSRAM and flash at a different address than the processor.

You can check this with the "Address Map" button, which gives you a nice table which periphereal sees which periphereal at which address.

Try connecting the DMA's read and write master to the flash_ssram_tristate_bridge or to the flash_ssram_pipeline_bridge, as the other DMA and the NIOS are connected there too.

Have you had the DMA disabled?

I had the problem of the SOPC builder not realizing adress changes for components that were disabled during the change.

You might need to disconnect and reconnect the DMA read and write master connections to have the SOPC builder update the addresses.