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AlteryxRPluginEngine.dll could not be loaded: The specified procedure could not be found
When running any of the R-based predictive tools in Designer, you may come across the below error message:
AlteryxRPluginEngine.dll could not be loaded: The specified procedure could not be found. (127)
Product - Alteryx Predictive Tools
Any R-based predictive tool (Linear Regression, Decision Tree, Association Analysis, etc.)
Typically this error is caused by having a mismatch in versions between Designer and Predictive Tools. It is required that both Designer and Predictive Tools are on the same version number (e..g, 2018.4) and type (Admin/Non-Admin).
Search Windows for "Add or Remove Programs" or go there through the Control Panel
Uninstall both Alteryx Designer and Alteryx Predictive Tools
Note: It is fine to only uninstall either all Admin versions, or all Non-Admin versions, if desired. Non-Admin versions will say (User) in parentheses.