To use REFPROP 9.1 in MATLAB, you need a wrapper file (often provided in the MATLAB subfolder of the installation). In MATLAB, use addpath('C:\Program Files (x86)\REFPROP') . Use the refpropm.m function to call properties.
If you see #NAME? in Excel, it usually means the REFPROP.xlam is active but it cannot find the REFPROP.dll in the Windows system folders.
Click install. Once finished, you will see a "REFPROP" shortcut on your desktop. 3. Integrating REFPROP 9.1 with Microsoft Excel
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