diff --git a/js/app/views/PlotComponents/PlotTree.js b/js/app/views/PlotComponents/PlotTree.js
index 86a7b79..4905100 100644
--- a/js/app/views/PlotComponents/PlotTree.js
+++ b/js/app/views/PlotComponents/PlotTree.js
@@ -692,9 +692,10 @@ Ext.define('amdaPlotComp.PlotTree', {
                                         this.dropParamToCreate(targetNode, position, "#" + record.get('text'));
                                         return true;
                                     case 'amdaModel.DerivedParamNode' :
-                                                                            if (!record.get('isParameter'))
+                                            if (!record.get('isParameter'))
                                             return false;
                                         //targetNode, position, paramId, paramComponents, isVector, plotOnly
+                                        var isVector = record.get('iconCls') == 'icon-vector';
                                         var components = null;
                                         var dim1=record.get("dim_1");
                                         var dim2=record.get("dim_2");
@@ -707,7 +708,7 @@ Ext.define('amdaPlotComp.PlotTree', {
                                             components = [];
                                             components['index1'] ="0"
                                         }
-                                        this.dropParamToCreate(targetNode, position, "ws_" + record.get('text'),components);
+                                        this.dropParamToCreate(targetNode, position, "ws_" + record.get('text'),components,isVector);
                                         return true;
                                     case 'amdaModel.DerivedParamComponentNode':
                                         if (!record.get('isParameter'))
--
libgit2 0.21.2