Refprop 91 Install _top_ Jun 2026

You will need to point your script to refprop.dll . Ensure your Python environment is the same "bitness" (32-bit vs 64-bit) as the DLL you are calling. 6. Troubleshooting Common Errors

Many third-party programs cannot find REFPROP because its folder isn't registered in the Windows system path. Adding it manually prevents most connection errors.

Follow these steps to install the core database and user interface on a Windows machine. Step 1: Run the Installer

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

At the bottom, select from the drop-down menu and click Go . refprop 91 install

Press the , type Environment Variables , and select Edit the system environment variables .

You will need permission to write to the C:\Program Files (x86) directory.

The most common use case for version 9.1 is within Excel via the Locate the Add-in REFPROP.XLS in your installation folder. Save a copy as REFPROP.XLA REFPROP.XLAM to your local "Add-ins" folder. Set Trusted Locations Open Excel and go to File > Options > Trust Center > Trust Center Settings Trusted Locations and add the folder C:\Program Files (x86)\REFPROP Activate the Add-in File > Options > Add-Ins In the "Manage" dropdown at the bottom, select Excel Add-ins (or browse to find the file if it's not listed). Fixing DLL Links : If functions return errors, press to open the Visual Basic Editor. Check if the path to REFPROP.DLL in the module matches your actual installation path. National Institute of Standards and Technology (.gov) 3. Installation on macOS

: If you no longer have your original 9.1 installer and need to reinstall, you can contact NIST support at ian.bell@nist.gov for assistance. National Institute of Standards and Technology (.gov) Are you planning to use REFPROP with a specific application like Excel, MATLAB, or Python? Answers to Frequently Asked Questions - NIST Pages You will need to point your script to refprop

It is designed for Windows environments; older documentation suggests compatibility back to Windows 95/NT, but it remains functional on modern Windows 10/11 systems with proper user permissions. Linking to Microsoft Excel

Once you have downloaded the installation package, follow these steps:

In the System Properties window, click the button at the bottom.

Click on in the top menu bar, select Separate Fluids , and choose a common fluid like Water . Click on Calculate -> Saturation Tables . Step 1: Run the Installer This public link

To install REFPROP 9.1, you need to download the software from the NIST website. Follow these steps:

Now, let’s walk through the actual process. I will assume you have a legitimate installer named something like REFPROP91_setup.exe .

Click and append your REFPROP folder path ( C:\REFPROP ) to the list. Click OK on all windows to save and apply the changes. 4. Verifying the Installation