How to close Acrobat reader from the command line?

[RunningBeare]

Hi,

Thanks for the great tool it seems to be doing everything that I need except for the final step.

I'm using this tool from the command line to automate the reprinting PDFs. Some of the PDFs that I receive are very bloated so I'm reprinting/recreating them, this often reduces their size but over 90%, but unfortunately the tool isn't closing the original PDF after printing.

I'm working with the example given here http://www.biopdf.com/guide/examples/command_line/

@ECHO OFF

@REM Set environment variables used by the batch file
SET PRINTERNAME=Bullzip PDF Printer

REM Create runonce.ini
SET LAPP=%LOCALAPPDATA%
IF "%LAPP%"=="" SET LAPP=%USERPROFILE%\Local Settings\Application Data
SET RUNONCE=%LAPP%\PDF WRITER\%PRINTERNAME%\runonce.ini
ECHO %RUNONCE%
IF EXIST "%RUNONCE%" DEL "%RUNONCE%"

ECHO Save settings to "%RUNONCE%"
ECHO [PDF Printer] >> "%RUNONCE%"
ECHO output=%CD%\out\demo.pdf >> "%RUNONCE%"
ECHO author=Demo Script >> "%RUNONCE%"
ECHO showsettings=never >> "%RUNONCE%"
ECHO showpdf=no >> "%RUNONCE%"
ECHO watermarktext=Batch Demo >> "%RUNONCE%"
ECHO confirmoverwrite=no >> "%RUNONCE%"
printto.exe "in\example.pdf" "%PRINTERNAME%"
ECHO ERRORLEVEL=%ERRORLEVEL%

EDIT: Everything works perfectly when run against the example.rtf
Execution is frozen on the printto.exe line until I manually close acrobat.
I've also noticed that the new PDF is opened once I manually close the original PDF. This seems to be over and above the "showpdf=no" param if I set this to yes I get two copies of the new PDF opened

If you'd like to see my code so far please let me know. Any help will be greatly appreciated