diff --git a/R/DataMart.R b/R/DataMart.R
index 85776eb..121e5e1 100644
--- a/R/DataMart.R
+++ b/R/DataMart.R
@@ -343,6 +343,12 @@ 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 == 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. ",