I'm a little new on Telerik Reporting, but I have a big issue. I try to make a simple calculation of a field to result a TOTAL sum... but instead of SUM i recive a kind of CONCATENATE of my cells
We really need to see the actual report to see how you did the SUM() expression.
However, just looking at your screen shot and noticing that your values are left justified....are you sure the values are numbers that you are trying to add up?
The expression should be in the format of "=SUM(Fields.Column + Fields.Column.......)
Post a screen shot of the actual expression and I can help more.