diff --git a/client/components/curves_settings_popup/curves_settings_popup.js b/client/components/curves_settings_popup/curves_settings_popup.js
index bddf901..4d3e475 100644
--- a/client/components/curves_settings_popup/curves_settings_popup.js
+++ b/client/components/curves_settings_popup/curves_settings_popup.js
@@ -48,9 +48,24 @@ class CurvesSettingsPopup extends HTMLElement{
             let configurationLineObject = this.getRowValues(row);
             let formmatedLineConfiguration = {...configurationLineObject};
 
-            if(!formmatedLineConfiguration.hasOwnProperty("variable") && Object.keys(formmatedLineConfiguration).length > 0){   
-                alertify.error("Variable not defined for some row(s).");
-                throw Error;
+            if(!formmatedLineConfiguration.hasOwnProperty("variable")){
+                let definedFields = Object.keys(formmatedLineConfiguration).length;
+                if(formmatedLineConfiguration.hasOwnProperty("cat")){
+                    if(formmatedLineConfiguration["cat"] === "*"){
+                        if (definedFields >= 2){
+                            alertify.error("Variable not defined for some row(s).");
+                            throw Error;
+                        }
+                    }else{
+                        alertify.error("Variable not defined for some row(s).");
+                        throw Error;
+                    }
+                }else{
+                    if (definedFields > 0){
+                        alertify.error("Variable not defined for some row(s).");
+                        throw Error;
+                    }
+                }
             }else{
                 let key = formmatedLineConfiguration["variable"];
                 delete formmatedLineConfiguration["variable"];
@@ -200,6 +215,9 @@ class CurvesSettingsPopup extends HTMLElement{
         input.name = type;
         input.classList.add("text-input");
         input.value = "";
+        if (type == "cat"){
+            input.value = "*";
+        }
         if(lineConfiguration != null && lineConfiguration.hasOwnProperty(type)){
             input.value = lineConfiguration[type];
         }