I am attempting to pass an empty DateTime value to a .Net web service that allows for nillable. However, I get this error before the web service is called: Caused by: java.lang.NullPointerException at java.util.Calendar.setTime(Calendar.java:1075) at java.text.SimpleDateFormat.format(SimpleDateFormat.java:876) at java.text.SimpleDateFormat.format(SimpleDateFormat.java:869) at java.text.DateFormat.format(DateFormat.java:316) at cQ.a(SourceFile:308) at bJ.a(SourceFile:92)... How do a pass an empty DateTime value?