App Designer errors on startup

When I try to open App Designer (R2017a) I get the following error messages in the command window, and the App Designer doesn't open:

Undefined variable "connector" or class "connector.ensureServiceOn".
Error in appdesigner.internal.application.AppDesignEnvironment.getPeerModelManager (line 222)
            connector.ensureServiceOn();
Error in appdesigner.internal.application.getAppDesignEnvironment (line 20)
    peerModelManager = appdesigner.internal.application.AppDesignEnvironment.getPeerModelManager( ...
Error in appdesigner (line 66)
appDesignEvironment = appdesigner.internal.application.getAppDesignEnvironment();

Can anybody suggest what might be causing this, and how to prevent it?

Thanks, Bob

Answer 1

[Bob]

Problem solved - the MATLAB path appears to have become corrupted, and

restoredefaultpath

has sorted it out.