Administrative privileges are required to write to the C:\Program Files (x86) directory.
A: Possibly, but it is not officially supported. Users report success using Windows 10 compatibility mode (right-click installer > Properties > Compatibility > Run as Windows 10).
Integrating REFPROP 9.1 with Excel is one of its most common use cases, allowing for thermodynamic calculations directly within spreadsheets. : Open Excel and navigate to the Developer tab. Select Excel Add-ins and click Browse .
To install (Reference Fluid Thermodynamic and Transport Properties Database), follow the step-by-step procedures outlined below. refprop 91 install
Some older installers trigger false positives in modern antivirus software (e.g., Windows Defender, McAfee). The installer uses self-extracting archives that may be flagged as suspicious. Disable real-time protection just for the installation duration, then re-enable it afterward.
Do not install over an existing REFPROP folder unless you are intentionally upgrading. Back up any custom fluid files ( .fld , .mix ) from C:\Program Files (x86)\REFPROP before proceeding.
After a successful installation, some additional steps are required to ensure the program and its various interfaces function correctly, particularly when linking with other software like Excel. REFPROP 9.1 uses an environment variable called . While the installer may create it for you, it's essential to verify its existence and path. Administrative privileges are required to write to the
Click on the button at the bottom of the System Properties window.
Ensure the link is updated. Go to the Data tab, click Edit Links , and select REFPROP.xlam . Use "Change Source" to point to the C:\Program Files\REFPROP location to ensure it is not running from a temporary folder. 4. Troubleshooting Common Install Issues
: The program usually installs to C:\Program Files (x86)\REFPROP . Integrating REFPROP 9
Add your installation path to the existing Path variable to ensure Excel can always locate the required DLLs ( REFPROP.DLL or REFPRP64.DLL ). 4. Common Troubleshooting Answers to Frequently Asked Questions - NIST Pages
Locate REFPROP.xls in your installation folder and save it as an Excel Add-In ( .xla or .xlam ) in the same directory.
Some installations ask for a restart to set environment variables (e.g., REFPROP_PATH ). If you see the prompt, reboot. If not, skip.
Click on at the bottom right of the window.
Read through the NIST license agreement. Click and accept the terms to proceed. Step 3: Select the Destination Directory The installer will prompt you for an installation path.