Copy a + b a sys cmd

Hi:

I have two files a.txt and b.txt. b.txt has information that I want to append onto a.txt. a.txt is empty (0 kb).

When I issue the cmd "copy a.txt + b.txt a.txt", a.txt now has all of b.txt + an extra character,hex code 1A, appended at the end. b.txt never had this char. a.txt s/b exact copy of b.txt Where is this extra char comming from and how do I stop this behavior?

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PaullkhaAsked:
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imladrisConnect With a Mentor Commented:
copy by default does things in "text mode". In this mode the 1a is an end of file character. Coincedentally, such a copy would not copy the whole file, if there were a 0x1a embedded in it.

You can solve all of the that by forcing a binary copy with the /B switch:

copy /B a.txt+b.txt a.txt

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PaullkhaAuthor Commented:
Actually, after it was adding the extra char, I was forcing a /A copy - wrong logic.

Thanks!
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