https://community.blueprism.com/t5/Product-Forum/Mainframe-System-AccessViolationException/m-p/57516#M11508 Is this some kind of multiple session issue - where you are trying to connect to session A which you are either already connected to or which has not previously been exited/disconnected/closed correctly?  If this never happens the first time you launch after starting your PC it could suggest that is the case and you should evaluate how you are closing/disconnecting from previous sessions. Wed, 21 Mar 2018 20:40:00 GMT Denis__Dennehy 2018-03-21T20:40:00Z https://community.blueprism.com/t5/Product-Forum/Mainframe-System-AccessViolationException/m-p/57515#M11507 IBM Personal Communications v12. Blue Prism v5.23 Sometimes, when I try to do a LAUNCH, I get the following error:   Internal : Failed to perform step 1 in Navigate Stage 'Launch' on page 'Launch' - Launch failed: Error from ConnectToHostOrSession: System.AccessViolationException: Intento de leer o escribir en la memoria protegida. A menudo, esto indica que hay otra memoria dañada.    en Microsoft.VisualBasic.CompilerServices.LateBinding.InternalLateCall(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack, Boolean IgnoreReturn)    en Microsoft.VisualBasic.CompilerServices.NewLateBinding.LateCall(Object Instance, Type Type, String MemberName, Object[] Arguments, String[] ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean IgnoreReturn)    en BluePrism.TerminalEmulation.clsIBMPComAutomation.StartSession(String& sErr)   Why? :S Mon, 05 Mar 2018 18:10:00 GMT https://community.blueprism.com/t5/Product-Forum/Mainframe-System-AccessViolationException/m-p/57515#M11507 Juan_MiguelLuqu 2018-03-05T18:10:00Z https://community.blueprism.com/t5/Product-Forum/Mainframe-System-AccessViolationException/m-p/57516#M11508 Is this some kind of multiple session issue - where you are trying to connect to session A which you are either already connected to or which has not previously been exited/disconnected/closed correctly?  If this never happens the first time you launch after starting your PC it could suggest that is the case and you should evaluate how you are closing/disconnecting from previous sessions. Wed, 21 Mar 2018 20:40:00 GMT https://community.blueprism.com/t5/Product-Forum/Mainframe-System-AccessViolationException/m-p/57516#M11508 Denis__Dennehy 2018-03-21T20:40:00Z