Knowledge Base

Downloaded EthoVision XT v18 from the MyNoldus link but, after extracting the ZIP archive, received an error indicating that the folder was empty. He tried multiple times and requested a working installation package. Support explained that the error relates to missing Intel Performance Primitives (IPP) runtime libraries (e.g., ippcore‑8.2.dll, ipps‑8.2.dll, ippvx‑8.2.dll) and recommended performing a clean reinstall of EthoVision.

FAQ & Step‑by‑Step Instructions

Q: Why does the installer say the extracted folder is empty or missing DLLs?
A: This can happen if the installation package is run directly from inside a ZIP file or if previous installations left behind incomplete components. EthoVision relies on Intel’s Performance Primitives libraries for video processing; if those DLLs are missing, the installer cannot proceed.

Q: How do I cleanly reinstall EthoVision XT v18?
A:

• Uninstall existing software – Go to Add/Remove Programs in Windows and uninstall anything labeled EthoVision or Noldus.
• Remove leftover folders – Delete any remaining Noldus directories from the following locations: C:\ProgramData\Noldus and C:\Users\<YourUser>\AppData\Local\Noldus.
• Restart the computer – Reboot to ensure all files are released.
• Extract the ZIP file – Download the ZIP archive again if necessary. Use Windows Explorer or a reliable extraction tool to unzip it to a local folder.
• Run the installer as administrator – Inside the extracted folder, right‑click exe and select Run as administrator. This will trigger the full set of prerequisite installations, including the IPP components required by EthoVision.
• Complete the installation – Follow the on‑screen instructions to install EthoVision XT v18. After installation, launch EthoVision normally.

Q: What are Intel IPP libraries and why are they needed?
A: Intel Performance Primitives (IPP) are runtime libraries used for image and video processing. EthoVision employs IPP for video handling; if these components fail to register correctly, EthoVision will not start. Running the installer as administrator ensures they are installed.

Q: What if the issue persists after a clean reinstall?
A: If you still encounter extraction errors or missing DLL messages:

• Verify the download – The ZIP file may be corrupted. Download it again using a stable internet connection.
• Try a different extraction tool – Use 7‑Zip or another unzip utility to extract the archive.
• Request a physical installer – Contact Noldus support to obtain a direct installer package or a new download link.
• Check antivirus software – Some security programs may block DLL registration. Temporarily disable them during installation and re‑enable them after completion.