error running "epwget" example app, got error "No Ethernet port!"

[terapackets]

Dear experts,

mTCP is very promising and i really want to try it for an application I am developing. However I failed to run the example (epget, epserver) with the error No Ethernet port!.

I started by following the instruction in readme of this repo:

./setup_mtcp_dpdk_env.sh /home/xyz/pkgs/mtcp/dpdk

Ran options 15, 18, 22

I ran option 24 twice to register my 2 10G ports (Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01))

Enter PCI address of device to bind to IGB UIO driver: 0000:01:00.0
Enter PCI address of device to bind to IGB UIO driver: 0000:01:00.1

The binding of the two ports looks ok

 ./dpdk/usertools/dpdk-devbind.py -s

Network devices using DPDK-compatible driver
============================================
0000:01:00.0 'Ethernet Controller 10-Gigabit X540-AT2 1528' drv=igb_uio unused=ixgbe
0000:01:00.1 'Ethernet Controller 10-Gigabit X540-AT2 1528' drv=igb_uio unused=ixgbe

Then in two separate terminals (both as root), I try to run epwget and epserver in the "apps/example" directory.
In the configure files for client server, I just made sure they are using "dpdk0" and "dpdk1" (which are in the output of ifconfig -a).
on the server side

# ./epserver -p . -f epserver.conf -N 2
Configuration updated by mtcp_setconf().
---------------------------------------------------------------------------------
Loading mtcp configuration from : epserver.conf
Loading interface setting
EAL: Detected 6 lcore(s)
EAL: Detected 1 NUMA nodes
EAL: Auto-detected process type: PRIMARY
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
path=/sys/kernel/mm/hugepages/hugepages-1048576kB/free_hugepages|
EAL: No free hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: PCI device 0000:01:00.1 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:1528 net_ixgbe
EAL: Auto-detected process type: PRIMARY
Configurations:
Number of CPU cores available: 2
Number of CPU cores to use: 2
Maximum number of concurrency per core: 10000
Maximum number of preallocated buffers per core: 10000
Receive buffer size: 8192
Send buffer size: 8192
TCP timeout seconds: 30
TCP timewait seconds: 0
NICs to print statistics:
---------------------------------------------------------------------------------
Interfaces:
Number of NIC queues: 2
---------------------------------------------------------------------------------
Loading routing configurations from : config/route.conf
fopen: No such file or directory
Skip loading static routing table
Routes:
(blank)
---------------------------------------------------------------------------------
Loading ARP table from : config/arp.conf
fopen: No such file or directory
Skip loading static ARP table
ARP Table:
(blank)
---------------------------------------------------------------------------------

Checking link statusdone
CPU 0: initialization finished.
[mtcp_create_context:1359] CPU 0 is now the master thread.
CPU 1: initialization finished.

On the client side, I got the error when running

# ./epwget /test 1 -f epwget.conf -N 2
Configuration updated by mtcp_setconf().
Application configuration:
URL: /test
# of total_flows: 1
# of cores: 1
Concurrency: 0
---------------------------------------------------------------------------------
Loading mtcp configuration from : epwget.conf
Loading interface setting
EAL: Detected 6 lcore(s)
EAL: Detected 1 NUMA nodes
EAL: Auto-detected process type: SECONDARY
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket_32546_c7a9556cbf7
EAL: Probing VFIO support...
EAL: PCI device 0000:01:00.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:1528 net_ixgbe
EAL: Cannot find resource for device
[ SetNetEnv: 361] No Ethernet port!

Any help is appreciated!