>>290
set infilenm=aaa.txt
set outfilenm=bbb.txt
set "text1=111"
set "text2=222"
call>%outfilenm%
for /f "tokens=1* delims=:" %%A in ('findstr /n "^" %infilenm%') do (
set "line=%%B"
set line>nul 2>nul && call set "_t=%%line:%text1%=%text2%%%"||set _t=
set _t>nul 2>nul && (for /f "tokens=1* delims==" %%a in ('set _t') do (>>%outfilenm% (echo %%b))) || >>%outfilenm% (echo.)
)
set _t=
set text1=
set text2=
set line=
goto :eof