diff --git a/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java b/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java
index b8669d4..05e0dc8 100644
--- a/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java
+++ b/src/main/java/org/gcube/dataaccess/databases/sampler/Sampler.java
@@ -335,7 +335,7 @@ public class Sampler {
 
 		if (NumRows == 0) {
 			throw new Exception(
-					"The table has not rows. Smart Sample operation not possible");
+					"The table has 0 rows");
 		}
 
 		// // computation of the iterations number