Many thanks Gysbert ! it works great now. It also helps me to detect some problems with my source data files as it seems there are some duplications there ( you can see numbers lower than -1 or higher than 1 . There is something though I find strange and it happens to me as well in other Qview apps ( I am a beginner :-) , in the list box ( Equipment TAG ) the first value on the list is a blank value ( Null ? ) . Do you know why I have a blank value there ? Could it be a problem coming from my source file ( excel )?
Thanks again for the help