diff --git a/VS_mpi/Parallel-SAT.VC.db b/VS_mpi/Parallel-SAT.VC.db
index f0a70e7..21bf58c 100644
Binary files a/VS_mpi/Parallel-SAT.VC.db and b/VS_mpi/Parallel-SAT.VC.db differ
diff --git a/src_mpi/mpi_base.h b/src_mpi/mpi_base.h
index 010d108..f5400df 100644
--- a/src_mpi/mpi_base.h
+++ b/src_mpi/mpi_base.h
@@ -32,7 +32,7 @@ const int      MAX_CORE_LEN = 20000;
 const double   MIN_SOLVE_TIME = 0.0000001;
 const unsigned RECOMMEND_BATCH_VAR_COUNT = 20;
 const unsigned MAX_BATCH_VAR_COUNT = 31;
-const unsigned MAX_PART_MASK_VAR_COUNT = 20;
+const unsigned MAX_PART_MASK_VAR_COUNT = 21;
 const unsigned UINT_LEN = 32;
 const unsigned FULL_MASK_LEN = 625;
 const unsigned SOLVING_TIME_LEN = 15; // info about time of solving tasks