ups, yeah! My mistake here. :-)

but in fact I added this line after a number of iterations while finding the place where it stops. 

I have just removed print("DONE"), it doesn't change the result. 

I take it the problem is the chart is not showing, is that right? A couple of things to check: is the content set to HTML, so escape="false". Also, is the computed field rendered to the browser. If rendered is set to false, your code will not get passed to the browser.

 

When working with charts I usually put the same code in a second computed field, so I can debug it. I show that field (or set the rendered property so it only shows if I want it to) and also make sure escape is NOT false (i.e. set escape="true"), so it is not written to the screen as "pass-thru HTML", as it were.

 

I take it you've seen the two articles on the App Dev wiki, but if not, the first one is here: http://www-10.lotus.com/ldd/ddwiki.nsf/dx/Dojox_Charting_for_XPages

There are also links to a sample database.

 Yes, Paul, I had the content set to HTML and escape to "false", and I read the articles in lotus.wiki with the dojotoolkit.org already being my homepage :-)) the articles are were very helpful!

 

But getting back to business, I finally handled the problem by rewriting the script and printing the results on a step by step basis, amazingly - with no changes at all. This is not the first time when I get into such kind of weird behavior - I already reported a case when the code on the source pane is doubled when you copy/paste elements on WYSIWYG pane.