diff --git a/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/DMConverter.java b/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/DMConverter.java
index a139ae2..b3ee308 100644
--- a/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/DMConverter.java
+++ b/src/main/java/org/gcube/common/workspacetaskexecutor/dataminer/DMConverter.java
@@ -134,7 +134,53 @@ public class DMConverter {
 		if(parameter==null)
 			return null;
 
-		return new TaskParameter(parameter.getName(), parameter.getValue(), parameter.getValue(), toTaskParameterType(parameter.getTypology()));
+		Parameter p;
+		String defaultValue = "";
+		switch (parameter.getTypology()) {
+		case FILE:
+			FileParameter fp = new FileParameter();
+			break;
+		case OBJECT:
+			ObjectParameter op = new ObjectParameter();
+			defaultValue = op.getDefaultValue();
+			break;
+		case TABULAR:
+			TabularParameter tp = new TabularParameter();
+			break;
+		case ENUM:
+			EnumParameter ep = new EnumParameter();
+			defaultValue = ep.getDefaultValue();
+			break;
+		case LIST:
+			ListParameter lp = new ListParameter();
+			break;
+		case COLUMN:
+			ColumnParameter cp = new ColumnParameter();
+			defaultValue = cp.getDefaultColumn();
+			break;
+		case COLUMN_LIST:
+			ColumnListParameter clp = new ColumnListParameter();
+			break;
+		case DATE:
+			DateParameter dp = new DateParameter();
+			defaultValue = dp.getDefaultValue();
+			break;
+		case TABULAR_LIST:
+			TabularListParameter tlp = new TabularListParameter();
+			break;
+		case TIME:
+			TimeParameter timep = new TimeParameter();
+			defaultValue = timep.getDefaultValue();
+			break;
+		case WKT:
+			WKTParameter wktp = new WKTParameter();
+			defaultValue = wktp.getDefaultValue();
+			break;
+		default:
+			break;
+		}
+
+		return new TaskParameter(parameter.getName(), parameter.getValue(), defaultValue, toTaskParameterType(parameter.getTypology()));
 
 	}