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    <p>first, it seems <code>set</code> does not like spaces between the variable and the <code>=</code> sign: if you put a space, the variable name will include a space. so you must remove the space to properly define the variable name. </p> <p>plus, your syntax for capturing the output of the command into a variable is wrong. the only way i am aware of (after desperately searching stackoverflow for the answer) is to use a for loop trick to use a temporary variable (see <a href="https://stackoverflow.com/questions/108439/how-do-i-get-the-result-of-a-command-in-a-variable-in-windows">this question</a> for more details). actually, you also need to escape the pipe for the command to be parsed correctly.</p> <p>then, when the variable tested in the <code>if</code> expression does not exists, the results is always true, so make sure the variable exists. by removing the space as said above, the name in the if expression will match your variable name, and the test will execute properly.</p> <p>then you forgot to make a block around the 2 last commands. actually, you are testing if you have more than 21 files and compute the oldest if it is true, then you ALWAYS delete the oldest.</p> <p>also, the greater than operator <code>&gt;</code> may be understood as a redirection. you may need to use the GTR operator. </p> <pre><code>SET BACKUPDIR=C:\test FOR /F %%i in ('dir BACKUPDIR /b ^| find /v /c "::"') DO SET countfiles=%%i if countfiles GTR 21 ( FOR /F %%i IN ('DIR /B /O-D %BACKUPDIR%') DO SET OLDEST=%%i DEL %BACKUPDIR%\%OLDEST% ) </code></pre>
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    1. USAdrien Plisson
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    1. COthanks alot for the suggestion but its abit weird that now it doesnt care if countfiles is greater or lower than 21, at any case deletes a file :S
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    2. COi did add some more informations about spaces in the `set` command which may help resolve the problem.
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    3. COnow i corrected the way your variable is set...
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