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@echo off

REM <--Fetching installed service pack version and storing it in var-->
FOR /f "tokens=* " %%a in ('findstr /I "install.servicepack" ^< "C:\A\B\C\D.properties" ') DO SET temp=%%a
SET var=%temp:~22%
REM <-- I tested, correct value is getting assigned to var say 1.2.3-->

REM <--Next, I am changing the directory using CD, in which X, Y and Z is a fixed directory path and after that it is variable based upon %var% value

cd c:\X\Y\Z\%var%
echo %cd%
REM <-- I tested and directory is correctly set against cd c:\X\Y\Z\1.2.3

REM <--With in c:\X\Y\Z\%var% (c:\X\Y\Z\1.2.3), there is an exe called uninstaller.exe and I am executing it is below:
dir
ECHO MESSAGE: Starting Silent Uninstallation of ABC Package
uninstaller.exe -options -silent
ECHO MESSAGE: Finished Silent Uninstallation of ABC Package

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:: Make sure you quote file paths.

for /f "tokens=* " %%a in ('findstr /I "install.servicepack" ^< "C:\A\B\C\D.properties" ') do set "svcpak=%%a"
set "svcpak_dir=%svcpak:~22%"

cd "C:\X\Y\Z\%svcpak_dir%"
uninstaller.exe -options -silent

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:: Use PUSHD/POPD instead of CD

for /f "tokens=* " %%a in ('findstr /I "install.servicepack" ^< "C:\A\B\C\D.properties" ') do set "svcpak=%%a"
set "svcpak_dir=%svcpak:~22%"

pushd "C:\X\Y\Z\%svcpak_dir%"
uninstaller.exe -options -silent
popd

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:: Run the UNINSTALL command directly, without changing directories.

for /f "tokens=* " %%a in ('findstr /I "install.servicepack" ^< "C:\A\B\C\D.properties" ') do set "svcpak=%%a"
set "svcpak_dir=%svcpak:~22%"

"C:\X\Y\Z\%svcpak_dir%\uninstaller.exe" -options -silent

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:: Rely on CMD.EXE's search path, rather than whatever cygwin is using.

for /f "tokens=* " %%a in ('findstr /I "install.servicepack" ^< "C:\A\B\C\D.properties" ') do set "svcpak=%%a"
set "svcpak_dir=%svcpak:~22%"

cmd /c ""C:\X\Y\Z\%svcpak_dir%\uninstaller.exe" -options -silent"