Hi everyone! We are trying to parse byte-string from Nokia ALU device accounting. AV-pairs looks like: Alc-Acct-O-Inprof-Octets-64 = 0x00030000000000000001 Alc-Acct-O-Outprof-Octets-64 = 0x00030000000000003d9f Alc-Acct-O-Inprof-Octets-64 = 0x000400000000000000b1 Alc-Acct-O-Outprof-Octets-64 = 0x000400000000000000e8 Alc-Acct-I-All-Octets_64 = 0x80030000000000000005 Alc-Acct-I-All-Octets_64 = 0x80040000000000000000 We need to obtain second byte from Alc-Acct-O-Inprof-Octets-64 (this byte represents traffic-class number) Also, we need last 8 bytes from the same pair (this counter represents bytes counter itself) Trying this: %{expr: (0x80030000000000003d9f >> 64) & 0xFF} Raises an error - Shift must be less than 63 (was 64) This EXPAND %{expr: ((0x00030000000000003d9f >> 62) >> 2) & 0xFF} (0) --> 255 How can we obtain this counters without using an rlm_perl or rlm_python for av-pair parsing?