The original code cannot import any .xls files and gives me the following error. All filenames are .xls with only letters, digits, and underscores:   316 317 data _null_; 318 set file; 319 call symputx('file'||put(_n_,1.),filenames,'G'); 320 run; ERROR: Symbolic variable name FILE* must contain only letters, digits, and underscores. NOTE: Argument 1 to function SYMPUTX at line 319 column 6 is invalid. filenames=M:\LS\Data\BannerMerge\FilesGrade350_201 _ERROR_=1 _N_=10 ERROR: Symbolic variable name FILE* must contain only letters, digits, and underscores. NOTE: Argument 1 to function SYMPUTX at line 319 column 6 is invalid. ... View more