"There was an error opening this document. The selected file cannot be found." error message from Adobe Reader when you print the multiple PDF files in Office Outlook 2007

To resolve this issue, apply the following update:

2276479 Description of the Office Outlook 2007 hotfix package (Outlook-x-none.msp): August 31, 2010

Registry key information

Important This section, method, or task contains steps that tell you how to
modify the registry. However, serious problems might occur if you modify the
registry incorrectly. Therefore, make sure that you follow these steps
carefully. For added protection, back up the registry before you modify it.
Then, you can restore the registry if a problem occurs. For more information
about how to back up and restore the registry, click the following article
number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows

After you install the hotfix package, follow these
steps to enable the hotfix:

1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then select the following registry subkey:
   HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Options
   
3. On the Edit menu, point to New, click Key, type Attachments, and then press ENTER.
4. Locate and then select the following registry subkey:
   
   HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Options\Attachments
5. On the Edit menu, point to New, click DWORD(32-bit) Value, type FileTrackIdle, and then press ENTER.
6. Right-click FileTrackIdle, and then click Modify.
7. In the Value data box, type 5000, and then click OK.
   Note If the issue persists, increase the value data by 1000 until you can successfully print all the PDF files.
8. Exit Registry Editor.