I have in the past received a ‘Parse Error’ message on the screen (see attached) and by uninstalling and then installing a fresh copy of IG Index PRT the problem went away for several weeks.
I have tried to uninstall PRT but old files are still there – I suspect one of my trading files.
This type of error is a "generic", however it has often been encountered when using indicators that use several TIMEFRAMES and CALL in a strategy (which is not possible), is this the case?