diff --git a/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java b/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java
index 2f195ac..912be1b 100644
--- a/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java
+++ b/src/main/java/org/gcube/dataaccess/databases/lexer/LexicalAnalyzer.java
@@ -175,6 +175,9 @@ public class LexicalAnalyzer {
 
 	private static String parseRegularExpressions(String phrase) {
 
+		//replace the \n with the " "
+		phrase = phrase.replaceAll("\n", " ");
+		
 		// replacement of the punctuation characters
 		// String todelete = "[\\]\\[!#$%&()*+,./:;<=>?@\\^_{|}~-]";
 		String todelete = "[\\]\\[!#$%&()*+,./:;<=>?@\\^{|}~-]";