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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 1 : If the Alteryx installation is an Alteryx Server, please uninstall the Predictive tool installation alone and install the matching Predictive tool version, as uninstalling the Designer alone on an Alteryx Server based environment, will cause multiple issues.
Note 2: If Alteryx Designer is a standalone instance(i.e - only Designer is installed, and no Alteryx Server is installed), it is fine to only uninstall either all Admin versions(both Designer and Predictive tools), or all Non-Admin versions, if desired. Non-Admin versions will say (User) in parentheses.