If I use API stpapi.report it doesn't return any error. How shall I find errors related to this. Also a event choice.cont.process calls event print.data in a session, so, when I try to call choice.cont.process in AFS it doesn't execute print.data

First there is a forum just for posts like this - please visit theAFS/DDC/OLE: Function Servers (http://www.baanboard.com/baanboard/forumdisplay.php?f=59) forum. If a moderator for this forum would be so kind as to move it to the above forum I would appreciate is. You may also want to search this forum for the session in question.

What session are you referring to? Some reporting sessions are not as "kind" or "forgiving" as others. Maybe posting the code will also help.

Mark