solving a previous issue as explained here viewtopic.php?f=70&t=8880
by a port changing, i get a new error: when i open some project (not all), i get the same above exception:
[code]java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
at java.awt.Component.getLocationOnScreen_NoTreeLock(Unknown Source)
at java.awt.Component.getLocationOnScreen(Unknown Source)
at com.jidesoft.alert.Alert.internalShowPopup(Unknown Source)
at com.jidesoft.popup.JidePopup.showPopup(Unknown Source)
at com.inductiveautomation.ignition.designer.ConnectionHealthListener.setConnectionOk(ConnectionHealthListener.java:133)
at com.inductiveautomation.ignition.designer.ConnectionHealthListener.propertyChange(ConnectionHealthListener.java:165)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.setConnectionUp(AbstractGatewayConnection.java:566)
at com.inductiveautomation.ignition.client.gateway_interface.AbstractGatewayConnection.notifyGatewayException(AbstractGatewayConnection.java:672)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.fireGatewayException(GatewayInterface.java:170)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:313)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:450)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:248)
at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:239)
at com.inductiveautomation.ignition.designer.gateway.DTGatewayInterface.loadProject(DTGatewayInterface.java:349)
at com.inductiveautomation.ignition.designer.IgnitionDesigner$StartupProjectDialogHandler$1.run(IgnitionDesigner.java:377)
at java.lang.Thread.run(Unknown Source)
Ignition v7.5.3 (b1163)
Java: Sun Microsystems Inc. 1.6.0_33
[/code]
the machine has 2 virtual NICs but the IP were never changed.
the machine reboot doesn’t solve.
the only way to open the project in adesigner is opening the designer in a remote session locally on the server 
any suggestion? tnx