We have previously informed of ending support for older MetaTrader 4 terminal versions.
After July 1, 2019, we end support for all MetaTrader 4 platform components below 1170. Old terminal versions will not be able to connect to broker trading servers, while servers running under old versions will no longer receive updates.
The build 1170 released on December 20, 2018, fixed errors and improves the platform stability:
Please update your servers, including test and developer platforms, to the latest build 1170, and inform your traders on the necessity of updating the terminals to the latest version.
Before updating your trade servers, make sure all your plugins and extensions featuring manager functionality are recompiled using the latest versions of Server API and Manager API.