error when loading a bit file with more than 8 eps

[danielozer]

Issue Description

error when loading a bit file with more than 8 eps.

Setup Details

• uhd-4.9.0.0
• Ubuntu 20.04.6 LTS
• usrp x440
• yaml based on the x4_200 variant

Expected Behavior

no error when loading the bit file with the uhd_image_loader command

Actual Behaviour

at the end of the loading command this error is shown:
[ERROR] [RFNOC::GRAPH] Caught exception while initializing graph:
RfnocError: Specified destination address is unreachable: 1:0
Error: RuntimeError: Failure to create rfnoc_graph

*it only happens when i load bit file with more than 8 eps.
*actually the bitfile is loaded correctly - because after the loading command the uhd_usrp_probe not failing and returning the correct topology - and i can use the bitfile as intended.

Steps to reproduce the problem

make bit file with more than 8 eps (like the one i attached)
than load it on the usrp x440 - using this command:
uhd_image_loader --args="addr=192.168.X.X,type=x4xx,master_clock_rate=245.76e6" --fpga-path /home/brokenlink/usrp/x440_X4_200_1RX_splitTo16_rfnoc_image_core.bit

Additional Information

x440_X4_200_1RX_splitTo16_rfnoc_image_core.yml

[wordimont]

We have shipping images with more than 8 endpoints. Do you see the same behavior with x440_X4_400_rfnoc_image_core.yml?

I noticed that your YAML is missing the DMA connections in crossbar_routes and you have extra ctrl connections. Can you try setting ctrl to True only for ep0? And try connecting both the input and output paths for the DMA interface?