Managed by the FaxBack Support Team
This article applies to NET SatisFAXtion 8.5.


Installing the Fax Server (Versions 7.5x and newer only) or the Client Suite for Microsoft Outlook, the printer install fails with AddPrinterDriver error number 126: The specified module could not be found. ERROR(16777224)



The source of this information can be found here:

This is a known problem in certain Windows versions without installing the needed patches.
The error code 126 says some necessary modules are missing when calling Windows API AddPrinterDriver() function.

Solution 1

There is a simple solution to this problem:
1. Please check if the "framedyn.dll" is available in your system, if not

2. Please copy the "framedyn.dll" from other Windows system to the corresponding system folder.
Path: Windows\system32\dllcache\framedyn.dll

3. Click Start and choose Run. Enter %SystemRoot%\system32\wbem, and click OK.
4. Right-click the file framedyn.dll in folder wbem and select Properties. If the file size is not 185,856 bytes, goto Step 5.

5. Click Start and choose Run. Enter %SystemRoot%\system32\dllcache, and click "OK".

6. Copy the file framedyn.dll in folder dllcache to folder wbem and replace the original one.

Solution 2

1> Right-click "My Computer" on the Start menu and select "Properties".

2> Click "Environment Variables" on tab "Advanced".

3> Choose "Path" in "System variables" list and click "Edit".

4> Add "%SystemRoot%\System32\Wbem;" into the text box "Variable value" and click "OK".

5> Restart your computer and install Client Suite or NET SatisFAXtion Fax Server again.

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