<p>I've tried these, and they did not work (Access opens, but it does not wait:</p>

<pre><code>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
</code></pre>

```
```
start /WAIT msaccess.exe filename.mdb
```
```
does the trick.
I don't know why adding the full path makes it fail.