Index: applications/editors/josm/plugins/cadastre-fr/src/cadastre_fr/DownloadWMSVectorImage.java
===================================================================
--- applications/editors/josm/plugins/cadastre-fr/src/cadastre_fr/DownloadWMSVectorImage.java	(revision 24896)
+++ applications/editors/josm/plugins/cadastre-fr/src/cadastre_fr/DownloadWMSVectorImage.java	(revision 24899)
@@ -46,5 +46,8 @@
                     if (wmsLayer.isRaster()) {
                         // set raster image commune bounding box based on current view (before adjustment)
-                        wmsLayer.setRasterBounds(bounds);
+                        JOptionPane.showMessageDialog(Main.parent,tr("This commune is not vectorized.\nPlease use the other menu entry to georeference a \"Plan image\""));
+                        Main.main.removeLayer(wmsLayer);
+                        wmsLayer = null;
+                        return;
                     } else {
                         // set vectorized commune bounding box by opening the standard web window