Hi all, I'm parsing a file that represents a type of musical notation (Guitar Pro file format). In the format there are t tracks, each composed of m measures. In the file the measures are all stored sequentially, i.e. from measure 1 to measure t*m, in the following fashion: - measure 1 of track 1 ; - measure 1 of track 2 ; - ... - measure 1 of track t ; - measure 2 of track 1 ; - measure 2 of track 2 ; - ... - measure 2 of track t ; - ... - measure m of track 1 ; - measure m of track 2 ; - ... - measure m of track t ; I need a function that, given t and the list of t*m measures, can spilt the measures by track, returning a list of t lists, each containing m measures. I cannot figure out how to do this, even though it seems to me like it shouldn't be too hard... I can't figure out how to "update" the lists of lists when I want to add a new element. Do anyone have any ideas? Thanks, Patrick -- ===================== Patrick LeBoutillier Rosemère, Québec, Canada