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When using the Predictive tools, you may get an error stating that the Rcpp package cannot be loaded, or that the namespace load failed.
Unable to load the Rcpp package - Use the R installer provided by Alteryx
Product - Alteryx Designer Predictive Tools
User-installed packages may have overwritten Alteryx's default Rcpp package or a mismatch between Designer and Predictive Tools version may have caused the Rcpp version to become out of sync with Designer. Other causes are possible as well.
Make a backup and delete the existing Rcpp package from the folder corresponding to your Designer version (Admin or non-Admin):