Hi all, I'm attempting to do this simple concatination routine in the iReport that results in errors on build. In "Variable Experssion" I have this: $V{likesStr}+=$F{likes}+"," Basically, I want to build a coma separated string of field $F{likes}, then later create an array out of it. I tried criating an array on the fly, directly, but couldn't get it populated correctly, the array was retaining only the very last value out of a set of values. I'm hoping to get my array out of the string I'm attaempting to build. The compiler error is: '(java.lang.String) variable_likesStr.getValue()', is a bad expression as the left hand side of an assignment operator Any deailed suggestions will be much appreciated.