Shivkumar Chandrasekaran wrote: >Does anybody know if Clean represents {#{#Real}} as a 1D array in row >major order, or, as an array of pointers to 1D arrays (one for each >row)? Thanks, The latter, as an array of pointers to 1D arrays. Not necessarily one for each row, because these arrays may be shared, except for *{# * {#Real}}. Regards, John van Groningen