Hi, The format pi 0 1 (pi x) should be changed rather to Pi x or Product x In contradistinction to sigma in Extended ASCII there is only small pi. This was a reason that small pi was used for products. We mean the definitions: CARD_3:def 8 FVSUM_1:def 9 GROUP_4:def 3 RVSUM_1:def 11 Regards, Andrzej Trybulec & Grzegorz Bancerek