Downloading ELF Process failed of Project

Dear Daixiwen

I reference your support and read some datasheet .

I found , my problem maybe come from my memory config .

In my project , when I just use (sopc builder)

pll、nios、sdram、flash、jtag haven't problem .

But , when I add Enth Module、DMA、on-chip(ram or rom)

the niosII will tell me downloading elf process failed of project

Near, I read datasheet of page 6

http://www.altera.com/literature/manual/mnl_avalon_spec.pdf

I think ,maybe I need use FIFO Buffer(on-chip) replace on-chip(ram or rom)

but I still tree , because i first use this fifo buffer(on-chip)