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JMP Knowledge Base

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JMP® 19.0.4 and later return the error, "No valid R connection defined." despite having R 4.5 installed.
Apr 7, 2026 12:23 PM

JMP® 19.0.4 and higher does not find R when initialized. The following JMP alert is returned.

Ralert.png

 

 

 

 

The problem is that JMP 19.0.4 is assuming the R install path is C:/Program Files/R/R-4.5.0, despite the actual R install path being C:/Program Files/R/R-4.5.

Workaround: 

Define R_Home as C:/Program Files/R/R-4.5.x before launching JMP 19.0.4 or higher.

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