diff --git a/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/legacy/report/ConstraintCheck.java b/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/legacy/report/ConstraintCheck.java
index 558d108..211c73e 100644
--- a/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/legacy/report/ConstraintCheck.java
+++ b/geoportal-common/src/main/java/org/gcube/application/geoportal/common/model/legacy/report/ConstraintCheck.java
@@ -7,9 +7,11 @@ import java.util.List;
 
 import lombok.Getter;
 import lombok.Setter;
+import lombok.extern.slf4j.Slf4j;
 
 @Getter
 @Setter
+@Slf4j
 public class ConstraintCheck<T> {
 
 	public static <T> ConstraintCheck<T> defaultFor(T toCheck,T defaultValue){
@@ -55,6 +57,8 @@ public class ConstraintCheck<T> {
 		T result=theObject;
 		if(isError()) {
 			result=theDefault;
+			log.debug("Applying default {} for current value {}",theDefault,theObject);
+
 			if(theDefault!=null && theDefault instanceof Collection) {
 				Collection defaultCollection=(Collection) theDefault;
 				ArrayList target=new ArrayList(defaultCollection);
diff --git a/geoportal-common/src/main/java/org/gcube/application/geoportal/common/utils/Files.java b/geoportal-common/src/main/java/org/gcube/application/geoportal/common/utils/Files.java
index 1bb66bd..fc04d6b 100644
--- a/geoportal-common/src/main/java/org/gcube/application/geoportal/common/utils/Files.java
+++ b/geoportal-common/src/main/java/org/gcube/application/geoportal/common/utils/Files.java
@@ -85,6 +85,8 @@ public class Files {
 	}
 	
 	public static String fixFilename(String toFix) {
+		if(toFix.startsWith("\\."))
+			toFix=toFix.replaceFirst("\\.","_");
 		String extension="";
 		if(toFix.contains(".")) {
 			//preserve extension