@@ -842,7 +842,7 @@

     }

     if (getOption("ISAnalytics.parallel_processing", default = TRUE) == TRUE &

-        max_workers > 1) {

+        (!is.null(max_workers) && max_workers > 1)) {

         # Set up parallel workers

         old_be <- doFuture::registerDoFuture()

         old_plan <- future::plan(future::multisession, workers = max_workers)