Point your script directly to the C:\REFPROP directory to call the DLL files.
or restart your command prompt/IDE to apply the new path settings. 4. Integrating REFPROP 9.1 with External Software Integrating with Microsoft Excel refprop 91 install
This article provides a comprehensive guide to installing , the NIST Reference Fluid Thermodynamic and Transport Properties Database. Point your script directly to the C:\REFPROP directory
The RPprefix environment variable instructs any program (like Excel or MATLAB) where to find the REFPROP core files (FLUIDS, MIXTURES folders). An incorrectly set RPprefix is a primary reason why interfaces fail to locate property files. refprop 91 install