Any limits on cmd.exe command echo?

Question

I'm using this piece of code to manipulate a txt file content:

setlocal enabledelayedexpansion

SET /A count=1
FOR /F "delims=" %%A IN (a.txt) DO (
  ECHO !count! %%A
  ECHO %%A >> b.txt
  SET /A count+=1
)

It works well, printing the line number and the line content of the file a.txt and put the line in file b.txt

Unfortunately it crashes if I have really big lines (they are about 8K characters each).

Just for example I used just two lines of the big file:

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Any particular settings to use to solve the problem?

See [Maximum Length of Command Line String](https://stackoverflow.com/questions/3205027/). The command line length limit of 8192 characters (with terminating null byte) of Windows command processor cannot be easily worked around. It is necessary to use an executable which does not have this limitation. The simple solution would be using a PowerShell script for your task as PowerShell has no such line length limitation. Windows command processor is designed for executing commands and programs. It is not designed for file contents changing tasks. A VB script could be also used for this task. — Mofi, May 22 '20 at 10:02
Umm. OK. Thank you very much Mofi. I will do the job otherwise. — user3318590, May 22 '20 at 10:08

Any limits on cmd.exe command echo?

0 Answers0