Wrote an indicator, compiled it with 3 warnings (2* possible lose of data and one implicit conversion from number to string).
Trying to add it to a chart I get the error: Incorrect version 'MyIndicatorName.ex4'
System: win vista SP2, build 268 for metaeditor and 271 for platform
On every new update, I get a warning from AVG which I select "Ignore" in order to continue the installation process.
I guess the problem was different build for the mql5 and platform.
For some reason the auto update didn't install the latest mql5 by only the latest terminal - BUG?
I uninstalled the mt5 and reinstalled using the web installer from the site.
Seem to have worked.