AGGREGATE OUTFILE = 'CRITERIA.SAV' / BREAK = SUBJECT ORDER / PCT_300 = PGT(FLAG_300,0) / PCT_400 = PGT(FLAG_400,0) / PCT_10K = PGT(FLAG_10K,0) / AVELTNCY ERRORPCT = MEAN (LATENCY ERROR) / NTRIALS = N .SPSS gives me the following error in the output: >Error # 61 in column 21. Text: CRITERIA.SAV >The filename is not valid. >Execution of this command stops.Am I supposed to specify a file name or something? It seems a rather basic syntax question, but any help is appreciated. Best, Ali