diff --git a/ses.el b/ses.el
index 06a3d51..f7893de 100644
--- a/ses.el
+++ b/ses.el
@@ -2252,7 +2252,7 @@ Based on the current set of columns and `window-hscroll' position."
 				      names)))))
 		 (if
 		     (string= s "")
-		     (error "Invalid cell name")
+		     (user-error "Invalid cell name")
 		   (list (intern s)))))
   (let ((rowcol (ses-sym-rowcol sym)))
     (or rowcol (error "Invalid cell name"))
@@ -3380,7 +3380,7 @@ buffer."
           ((derived-mode-p 'ses-mode) ses--local-printer-hashmap)
           ((minibufferp) ses--completion-table)
           ((derived-mode-p 'help-mode) nil)
-          (t (error "Not in a SES buffer")))))
+          (t (user-error "Not in a SES buffer")))))
   (when local-printer-hashmap
     (let ((ses--list-orig-buffer (or ses--list-orig-buffer (current-buffer))))
       (help-setup-xref
@@ -3414,7 +3414,7 @@ buffer."
           ((derived-mode-p 'ses-mode) ses--named-cell-hashmap)
           ((minibufferp) ses--completion-table)
           ((derived-mode-p 'help-mode) nil)
-          (t (error "Not in a SES buffer")))))
+          (t (user-error "Not in a SES buffer")))))
   (when named-cell-hashmap
     (let ((ses--list-orig-buffer (or ses--list-orig-buffer (current-buffer))))
       (help-setup-xref