[Xymon] Xymonlaunch Fatal Signal Caught

I am not sure what happened. I started to receive Fatal Signal Caught for XymonLaunch.

I checked the xymonlaunch log and started seeing the following messages:

2017-11-16 19:10:15.609314 Task cid:image002.gif at 01D34FFA.21DA2880 terminated by signal 6 2017-11-16 19:10:15.609489 Task cid:image001.gif at 01D34FFA.21DA2880 terminated by signal 6 2017-11-16 19:10:15.609533 Task cid:image004.png at 01D34FFC.9E097850 terminated by signal 6 2017-11-16 19:10:15.609845 Task cid:image003.gif at 01D34FFA.21DA2880 terminated by signal 6

There were also core dumps in tmp directory.

Does anyone have any idea what is causing this?