calendar + REPORT_LOCALE parameter makes read fields Error:null

[roosit]

 

if i create a calendar parameter, like this:

Calendar.getInstance($P{TZ},$P{REPORT_LOCALE})

or even like this:

Calendar.getInstance($P{TZ}, new java.util.Locale(($P{REPORT_LOCALE}==null)?"en":"en", "GB"))

properties -> edit query -> read fields -> results in Error:null

If i only change in the report the calendar parameter to

Calendar.getInstance($P{TZ}, new java.util.Locale("en", "GB"))

Everything is working correctly.