>After a diffing I found the problem. All my fault, of cource (I don't know how to express red face here). In a group footer band i ut the field Val & check Sum as Calculation for it. after removing calculations for the field everithing works OK in both ways (my and your). But I wande is this a bug of Report engine? why the values I define for report must depends of calculations of fields?

Your description is too scetchy to understand what's going on.