Refprop 91 Install ((exclusive)) May 2026

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.

If you have CoolProp installed, you can call REFPROP fluids by setting the "Alternative Path." refprop 91 install

By default, the installer suggests C:\Program Files (x86)\REFPROP . If you see #NAME

REFPROP is a commercial product. You must have the REFPROP91.EXE setup file or the physical media purchased from NIST. If you see #NAME? in Excel