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App can’t be opened because Apple can’t check it for malicious software

Does MAC OSX refuse installation?

You get error message “[App] cannot be opened because Apple cannot check it for malicious software. This software needs to be updated. Contact the developer for more information” or a reference to “unidentified developer“.

Normally this is caused by Privacy & Security settings of your system. To get past it, follow information in THIS article


OSX Security and Privacy

Unable to load DLL ‘CPenCore.dll’


Unable to load DLL ‘CPenCore.dll’: The specified module could not be found. (Exception from HRESULT: 0x8007007E)

This and similar error(s) may be caused by missing dependencies. As a first step a clean reinstall is recommended to make sure all dependencies are correctly installed.

How to uninstall C-PEN Core on MAC

When C-PEN Core is installed, an Uninstaller is also copied to your Home directory. Open Finder, click GO in the menu and select Home and you will find the uninstaller.

Double click to run it, select to remove all files when prompted.


If the uninstaller is nowhere to be found, C-PEN Core can be uninstalled manually.

See this video for files to be erased.

Unexpected error

If C-Pen software crashes due to “Unexpected error” or “Object reference not set to an instance of an object” it most likely depend on lack of/wrong versions of one or more of the three 3 Windows dependencies the software rely on. These three dependencies are C++ Redistributables 2005, 2008, and 2010.

To resolve the problem, it´s recommended to manually download and install all three.

Download url’s to Windows dependencies: C-PEN redists

The zip file contains three redists:

If installation of the redistributables fails or C-Pen Core consistently crashes with same error message, try to enable installation logging and retrieve and send the installation log file to [email protected]

Windows 7 | 8:

To enable and collect the Windows 7/8 Installer logs, download Microsoft Fix it 20095 and run it. This Fix it is for Windows 8 and Windows 7 users only.

For more details see:

List of installer error codes:

Windows XP:

To enable and collect the Windows XP Installer logs, download Microsoft Fix it 50380 and run it. This Fix it is for Windows XP only.

For more details see:

To retrieve log files go to the temp folder: write %temp% in File Explorer address field and locate the appropriate log file (search by time stamp).

Software downloads for discontinued products

C-Pen TS1

October 2019: TS1 is replaced by TS1 (G2)

C-Pen 20 + 3.0:

C-Pen 3.5:

C-Pen 10:

C-Pen 200/600/800:

C-PEN TS/X for TS1:

How to get rid of the click sound (MAC)

Normal procedure to deactivate the click sound is to go to System PreferencesC-PEN Core settings and uncheck the Sound on checkbox.

See video for details.


If that for any reason fails, please go to LibraryInput Methods where you will find (see this video about how to locate Library folder).

Open‘s preferences and Show Package Content.

Delete the two (2) .wav files.

Reboot the computer.


See the video for details.


Check you Windows system

This article refers to computer connected (USB) C-PEN models.

To check your Windows system…

  1. Press Start button+Pause/Break button
  2. In the windows showing up, locate System type (32 bit or 64 bit).

(Click on images to enlarge)


How to make a clean reinstall of C-PEN Core

To make a clean re-install of C-PEN Core software, these steps are required:

  1. Uninstall C-Pen Core and C-PEN OCR Engine.
  2. Manually delete leftover files
    1. In folder Program Files (x86), delete C Technologies and C-Pen folders (if still present).
    2. In folder Users\[user-name]\AppData\Roaming, delete folders C Technologies and Virrata AB (if still present).

Note that AppData folder may be hidden. See Microsoft support about how to make it visible.


How to scan

If you repeatedly get “scan failed” it may be caused by a number of things.

Once you get it right once it is pretty easy but pay attention to the following:

  1. Do not scan too slow.
  2. When the C-Pen touch the paper and the light goes on – start scanning. Do not wait too long.
  3. Keep an even speed.
  4. Avoid rotating the C-Pen while scanning.
  5. Make sure that the text line to be scanned is centered between in the opening gap of the C-Pen.
  6. Keep the C-Pen at about a 90 degree angle towards the paper when scanning.

Check the video for a good visual.


C-Pen 3.0 User Guides

User Guides: