Oracle Forms

Dear Gurus,

I'm newbie to oracle forms.I have one form with many items.In this, some items are not populated. these items are populated from four different cursors according to some conditions. for example,

IF <condtion1> true then
 open cursor1;
   populate all the items  from cursor1 columns
elsif <condition2>true then
   open cursor2;
    populate all the items  from cursor2 columns
elsif<condtion3>true then
    open cursor3;
   populate all items  from curso3r  columns
elsif<condtion4>true then
    open cursor4;
   populate all items  from cursor4  columns

This cursors are written in database level.
Now I want to know that from which cursor, The items are getting values.

My TL told me that to find this ,put some messages. But I don't know where I put message[either in forms or cursors?]. Is any easy way to find errors in the current form?

Thanks all.