Crossatab with incrementerFactoryClass

[max_ferrario]

HI all,

using IReport 3.7.1  I want to use crosstab with a custom IncrementerFacotryClass, because my value are number and string (-)

Using wizard, I insert the name of my java class in the field 'Incrementer Factory' of Measures, and I also select calculation as Sum. With this two properties my incrementerfactory class is ignored, while if I select calculation as nothing, the incrementer factory class is used.

Is correct?

thank in advance

massimo