[amel27]

Код:

@Echo Off
SetLocal EnableExtensions EnableDelayedExpansion

Set $F=file.txt

For /F "Tokens=1* Delims=[]" %%i In ('^<"%$F%" Find /V /N ""') Do (
If Not "%%j"=="" If Not Defined $F Set /A $N+=1& Set $F=F
If Not "%%j"=="" Echo.%%j>>out_!$N!.txt
If Defined $F If "%%j"=="" Set $F=)