diff --git a/utilities/particlesPhasicFlow/empty/empty.cpp b/utilities/particlesPhasicFlow/empty/empty.cpp
index e75d0dac..1b938c00 100755
--- a/utilities/particlesPhasicFlow/empty/empty.cpp
+++ b/utilities/particlesPhasicFlow/empty/empty.cpp
@@ -29,8 +29,7 @@ pFlow::empty::empty(
 	positionParticles(dict),
 	position_
 	(
-		maxNumberOfParticles_, RESERVE()
+		maxNumberOfParticles_, 0, RESERVE()
 	)
 {
-	position_.clear();
 }
\ No newline at end of file
diff --git a/utilities/particlesPhasicFlow/positionParticles/positionParticles.hpp b/utilities/particlesPhasicFlow/positionParticles/positionParticles.hpp
index fe579e71..3bcf7807 100755
--- a/utilities/particlesPhasicFlow/positionParticles/positionParticles.hpp
+++ b/utilities/particlesPhasicFlow/positionParticles/positionParticles.hpp
@@ -153,7 +153,10 @@ public:
 		}
 		else
 		{
-			return position();
+			realx3Vector vec(position().capacity(), RESERVE());
+			vec.assign( position().begin(), position().end());
+			
+			return std::move(vec);
 		}
 	}