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That was absolutely brilliant! Thanks so much.

r.-

Hi all:

I have two files:

file1:

74 DS 9871 199009871 1 1990 4 1 165200 Sc
pr de te sa ox
1.0 1.0 13.0000 35.7560 5.950
3.0 3.0 13.0100 35.7550 5.970...

Hi:

I've been searching the net but didnt find a clue. I have a file in which, for some records, some fields coincide. I want to compare one (or more) of the dissimilar fields and retain the one...

Thanks. I understand and appreciate your help.
Regs,

r.-

Great, that did it seamlessly! I try to understand how this piece of code works but it's far beyond my skills.

Now, let me ask for a step further. If I have this list of duplicate records :

58...

Hi all:

Let's suppose I have a file like this (but with many more records).

XX ME 342 8688 2006 7 6 3c 60.029 -38.568 2901 0001 74 4 7603 8
969.8 958.4 3.6320 34.8630
...

Yes, that one did it!! Thanks a lot,

r.-

Sorry for the misunderstanding. I cannot add your suggestion because each sentence is written in a different line. The desired output from

...

Hi all:

I have a file with NMEA sentences of the type:

$GPVTG,012.0,T,,M,00.0,N,,K*7D
$GPRMC,180541,A,3631.874,N,00617.423,W,00.0,004.0,210608,,*36
$SDDBT,,f,,M,,F*28...