I have used your example program to parse my ISO 8583 message.
But I have an issue (exception thrown after field 63 as invalid literal for int() with base 10).
I have captured following debug message ( only copied the important part of debug message here)when I set the ISO message.
This is the array of bits (before) [0, 0, 0, 'X', 'X', 0, 0, 'X', 0, 0, 0, 'X', 'X', 'X', 0, 0, 0, 0, 0, 0, 0, 0, 'X', 0, 0, 'X', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'X', 0, 0, 0, 'X', 'X', 0, 0, 0, 0, 0, 0, 'X', 0, 0, 0, 'X', 0, 'X', 0, 0, 0, 0, 0, 0, 0, 'X', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'X', 'X']
This is the input string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
String = 785222015300000001014182022000950500000000009C01005F2A0209785F3401009F02060000000001009F03060000000000009F1007060D0A03A020009F1A0208409F260824E62C2AC07110529F2701809F360200FF9F3704817D13EF9F3901079F6604A000C0009F6E0420700000CF010457134929457789172006D21032010013100000001F9A03190927DFDF23020840DFDF270100001030313233343536373839002135134929457789172006D21032010013100000001F5D3B3DB66D1FE2E7 offset = 114 bit = 63
Size of the message in LLL = 785
Setting bit 63 value 785222015300000001014182022000950500000000009C01005F2A0209785F3401009F02060000000001009F03060000000000009F1007060D0A03A020009F1A0208409F260824E62C2AC07110529F2701809F360200FF9F3704817D13EF9F3901079F6604A000C0009F6E0420700000CF010457134929457789172006D21032010013100000001F9A03190927DFDF23020840DFDF270100001030313233343536373839002135134929457789172006D21032010013100000001F5D3B3DB66D1FE2E7
String = offset = 902 bit = 127
So please kindly let me know where It went wrong.
I have used your example program to parse my ISO 8583 message.
But I have an issue (exception thrown after field 63 as invalid literal for int() with base 10).
I have captured following debug message ( only copied the important part of debug message here)when I set the ISO message.
This is the array of bits (before) [0, 0, 0, 'X', 'X', 0, 0, 'X', 0, 0, 0, 'X', 'X', 'X', 0, 0, 0, 0, 0, 0, 0, 0, 'X', 0, 0, 'X', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'X', 0, 0, 0, 'X', 'X', 0, 0, 0, 0, 0, 0, 'X', 0, 0, 0, 'X', 0, 'X', 0, 0, 0, 0, 0, 0, 0, 'X', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'X', 'X']
This is the input string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
String = 785222015300000001014182022000950500000000009C01005F2A0209785F3401009F02060000000001009F03060000000000009F1007060D0A03A020009F1A0208409F260824E62C2AC07110529F2701809F360200FF9F3704817D13EF9F3901079F6604A000C0009F6E0420700000CF010457134929457789172006D21032010013100000001F9A03190927DFDF23020840DFDF270100001030313233343536373839002135134929457789172006D21032010013100000001F5D3B3DB66D1FE2E7 offset = 114 bit = 63
Size of the message in LLL = 785
Setting bit 63 value 785222015300000001014182022000950500000000009C01005F2A0209785F3401009F02060000000001009F03060000000000009F1007060D0A03A020009F1A0208409F260824E62C2AC07110529F2701809F360200FF9F3704817D13EF9F3901079F6604A000C0009F6E0420700000CF010457134929457789172006D21032010013100000001F9A03190927DFDF23020840DFDF270100001030313233343536373839002135134929457789172006D21032010013100000001F5D3B3DB66D1FE2E7
String = offset = 902 bit = 127
So please kindly let me know where It went wrong.