I'm using social network procedures (so they require a full matrix, not just a line, to calculate) from Jim Moody's SPAN suite. All of my calculations work fine on a copy of the original data but I need to use data now that has 25 imputations attached to it in the same file, enough to well overload my memory allocations. Each line has both an id number for the case and an imputation number (0-25). Is it possible to use the blocking technique with 26 identically sized blocks to perform the analysis and save all the results out to a single standard SAS file?