Mention either response code.

Author: david-young-displayr

R/DataMart.R

@@ -343,7 +343,13 @@ QSaveData <- function(object, filename, compression.file.size.threshold = NULL,
 
     if (!has.errored && res$status_code == 413) # 413 comes from IIS when we violate its web.config limits
         stopBadRequest(res, "Could not write to Displayr Cloud Drive. Data to write is too large.")
-    else if (!has.errored && (res$status_code == 404 || res$status_code == 422))
+    else if (!has.errored && res$status_code == 422)
+    {
+        stop("QSaveData has encountered an unknown error. ",
+            "422: The file could not properly be saved. ",
+            "The likely cause was an incorrect path preceding the filename, or insufficient access to the file path.")
+    }
+    else if (!has.errored && res$status_code == 404)
     {
         stop("QSaveData has encountered an unknown error. ",
             "404: The file could not properly be saved. ",