diff --git a/public/userarea/manage-worksheet.php b/public/userarea/manage-worksheet.php
index 9d9ae40b..7f592756 100644
--- a/public/userarea/manage-worksheet.php
+++ b/public/userarea/manage-worksheet.php
@@ -2303,6 +2303,14 @@ $isEdit = ($worksheet_id > 0);
                     });
                     return;
                 }
+                if (!$('#idmatrice').val()) {
+                    Swal.fire({
+                        icon: 'warning',
+                        title: 'Seleziona prima la matrice',
+                        text: 'Scegli la matrice / profilo, poi importa l’Excel.'
+                    }).then(() => $('#idmatrice').select2('open'));
+                    return;
+                }
                 $('#xlsxImportInput').val('').click();
             });