I've tried these, and they did not work (Access opens, but it does not wait: start "C:\program files\Microsoft Office\Office\MSACCESS.EXE" filename.mdb
start /WAIT "C:\program files\Microsoft Office\Office\MSACCESS.EXE" filename.mdb
start /W "C:\program files\Microsoft Office\Office\MSACCESS.EXE" filename.mdb
start filename.mdb
start msaccess.exe filename.mdb