How to set in LOV the username by default?

Hi everybody!
I am trying to bind the userName in a LOV Query Attribute by default and I need the Blank item too.
I followed this thread
Need help in Bind variable in AF Query LOV
and it works pretty well (Default: viewObject.DBTransaction.session.userPrincipalName) but when I select this "Blank item" get this error:
oracle.jbo.JboException: JBO-29000: Unerwartete Exception abgefangen: java.lang.reflect.UndeclaredThrowableException, Meldung=null
     at oracle.adf.model.binding.DCIteratorBinding.reportException(DCIteratorBinding.java:363)
     at oracle.adf.model.binding.DCIteratorBinding.executeQuery(DCIteratorBinding.java:2097)
     at oracle.jbo.uicli.binding.JUSearchBindingCustomizer.applyAndExecuteViewCriteria(JUSearchBindingCustomizer.java:590)
     at oracle.adfinternal.view.faces.model.binding.FacesCtrlSearchBinding.processQuery(FacesCtrlSearchBinding.java:357)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
"Blank item" works if I use String value by default but i need the current user.
Thanks

Hi Krishna,
You don't mention what platform you are running on, but I will presume it is a Windows platform. In the Windows architecture, the printer driver is the one that sets the default paper size/tray. Applications like Reports can override the default printer tray selection if they wish, but this is generally considered to be a bad practice, so Reports doesn't do this.
There are two possible solutions that I know of: (1) if all the users of a given report always use the same printer or same printer model, then you can explicitly choose the desired printer tray to use by calling SRW.SET_PRINTER_TRAY in the Before Report Trigger, the Between Pages trigger, or in an appropriate format trigger. (2) you can create another printer queue in Windows against the same physical printer, choosing a different printer tray as the default tray. Then people wishing to print using a different paper size/orientation can choose the appropriate printer "name" to print with.
regards,
Stewart

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How to set in LOV the username by default?

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