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FYI,
I am a long time user of eve-ng. I have a new laptop that I can't seem to get IOL images to run in the UI. I can start the images successfully from the command line with the following:

LD_LIBRARY_PATH=/opt/unetlab/addons/iol/lib /opt/unetlab/addons/iol/bin/i86bi-linux-l3-adventerprisek9-15.4.2T.bin 1

I know it isn't a licensing or permissions issue. When I try to start the same image from the UI, it just reports R1 started, but it never ran.

Windows 10
16GB RAM
SSD HD
Intel Core i7-8550u cpu @ 1.80 GHz 1.99
VMware Workstation 15 Player
Linux eve-ng 4.20.17-eve-ng-ukms+ #2 SMP Wed Jun 5 08:18:06 CEST 2019 x86_64 x86_64 x86_64 GNU/Linux


unl_wrapper.txt
Dec 23 16:11:35 INFO: starting /opt/unetlab/wrappers/iol_wrapper -T 0 -D 1 -t "R1" -F /opt/unetlab/addons/iol/bin/i86bi-linux-l3-adventerprisek9-15.4.2T.bin -d 0 -e 1 -s 0 -- -n 1024 -q -m 1024 > /opt/unetlab/tmp/0/deacd6d0-a182-4f55-abce-29002ee06cde/1/wrapper.txt 2>&1 &

Dec 23 16:11:35 INFO: CWD is /opt/unetlab/tmp/0/deacd6d0-a182-4f55-abce-29002ee06cde/1

Dec 23 16:11:35 INFO: sysctl -w net.ipv6.conf.vunl0_1_48.disable_ipv6=1

Dec 23 16:11:35 INFO: tunctl -u unl0 -g root -t vunl0_1_48 2>&1

Dec 23 16:11:35 INFO: sysctl -w net.ipv6.conf.vunl0_1_32.disable_ipv6=1

Dec 23 16:11:35 INFO: tunctl -u unl0 -g root -t vunl0_1_32 2>&1

Dec 23 16:11:35 INFO: sysctl -w net.ipv6.conf.vunl0_1_16.disable_ipv6=1

Dec 23 16:11:35 INFO: tunctl -u unl0 -g root -t vunl0_1_16 2>&1

Dec 23 16:11:35 INFO: sysctl -w net.ipv6.conf.vunl0_1_0.disable_ipv6=1

Dec 23 16:11:35 INFO: tunctl -u unl0 -g root -t vunl0_1_0 2>&1

I tried the with tne Pro versions and Community Edition. Both exhibit the exact same symptoms. I can start the IOL images from the command line, but doing so from the Web UI nothing happens. It will report the router started but it never actually does so.

eve-ng-pro
Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.20.17-eve-ng-ukms+ x86_64)

ir I can help you...
I already answered you in the EVE Live chat...

Uldis

I am having the same problem. Would have been nice to have the answer here as opposed to chat...

It ia iauue with iourc file only
iourc is IOL lic file