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I have thought of sending the following as private message, but if 50% of posters have problems with what i wrote, there may be much more readers with the same problem, so i have decided to post this. I'm not sure what problem you have with these two examples, so i try a detailed explanation of: 1) ...

@Squashman I think the real question is why does it work when it is not Quoted but does not work when it is quoted. This is easy: the unquoted version produces two chars (the <nul part produces it). You can make it visible by creating a file named piped.bat with the following content: @echo off setl...

You are making it sound like the SET command is executed once for each ECHO in the FOR loop

Sry, for this misunderstanding, it was meant as you say it then:

The FOR loop executes all the iterations before it moves on to the SET command.

Yes, the set command should be executed after the echo commands in the for loop. Their output form a multiline document with only one invalid line at the end. It's the same Sponge Belly does in the opening post using the command type. I have written an own version just to change the number of lines ...

These examples should only show, that this error handling is done per line,
not only on the first char in the pipe:
-the upper version interrupts execution, and so ignores the single char at the last line, while
-the lower version is fully executed.

Hi there, i'm sorry, but i'm sure that this is not a bug in findstr. Somewhen in 2001 or 2002 i have read how findstr handles redirected input within the XP dos shell - it's long ago, so i can't remember the link address; and i havn't found it in actual MSDN - sry for that - but i'm sure that it was...