When using a Windows 7 PC with regional settings set to Arabic or Saudi Arabia it is not possible to log on to ES from Workstation
StruxureWare Building Operation Workstation 1.3
On a Windows 7 PC with .NET 4.0 installed if the regional settings are Arabic or Saudi Arabia a user cannot log on to the Enterprise Server from Workstation.
This is not a problem with Webstation.
This is only an issue with Windows 7 with .NET 4.0 which is the currently supported configuration (April 2013).
The solution is to upgrade to .NET 4.5 or if required use Windows XP SP3 operating system. This has been tested on released version 1.3 and also 1.3.0 SP1 (build 18.104.22.16804-SP1).