diff -r --unified /home/stijn/parsec-2.1-mirror/pkgs/apps/freqmine/src/fp_tree.cpp /home/stijn/parsec-2.1/pkgs/apps/freqmine/src/fp_tree.cpp
--- /home/stijn/parsec-2.1-mirror/pkgs/apps/freqmine/src/fp_tree.cpp	2013-11-08 17:16:17.501719703 +0100
+++ /home/stijn/parsec-2.1/pkgs/apps/freqmine/src/fp_tree.cpp	2014-01-13 18:08:10.693419817 +0100
@@ -1246,6 +1246,8 @@
 
 void FP_tree::release_node_array_after_mining(int sequence, int thread, int workingthread)
 {
+#pragma omp critical
+  {
 	int current, i;
 	thread_finish_status[thread] = sequence;
 	current = 0;
@@ -1253,8 +1255,7 @@
 		if (current < thread_finish_status[i])
 			current = thread_finish_status[i];
 	}
-{
-#pragma omp critical
+
 	{
 		if (current < released_pos) {
 			released_pos = current;
@@ -1262,11 +1263,12 @@
 		}
 	}
 }
-
 }
 
 void FP_tree::release_node_array_before_mining(int sequence, int thread, int workingthread)
 {
+#pragma omp critical
+  {
 	int current, i;
 	thread_begin_status[thread] = sequence;
 	current = 0;
@@ -1275,16 +1277,14 @@
 			current = thread_begin_status[i];
 	}
 	current ++;
-{
-#pragma omp critical
+
 	{
 		if (current < released_pos) {
 			released_pos = current;
 			fp_node_sub_buf->freebuf(MR_nodes[current], MC_nodes[current], MB_nodes[current]);
 		}
 	}
-}
-
+  }
 }
 
 int FP_tree::FP_growth_first(FSout* fout)