It is the Development Version 6 of Build 129 .
It was the DEUIDXEUR indices of Dukascopydata.
I have no logs.
It happens only a fter a fresh install and than going to the DataManager and adding the DEUIDXEUR symbol first.
Does it work after restart ? If not, please attach file /user/data/data.db
Which build of SQX are you using ?
Which Symbol + Data source is it exactly?
Can you please attach the log file ?