diff --git a/src/compute_chunk_atom.cpp b/src/compute_chunk_atom.cpp
index 415ab42dc5..ac35629d08 100644
--- a/src/compute_chunk_atom.cpp
+++ b/src/compute_chunk_atom.cpp
@@ -616,6 +616,7 @@ void ComputeChunkAtom::setup()
 {
   if (nchunkflag == ONCE) setup_chunks();
   if (idsflag == ONCE) compute_ichunk();
+  else invoked_ichunk = -1;
 }
 
 /* ----------------------------------------------------------------------
diff --git a/src/pair.cpp b/src/pair.cpp
index 5d73a592e8..685280cfce 100644
--- a/src/pair.cpp
+++ b/src/pair.cpp
@@ -1534,7 +1534,7 @@ void Pair::virial_fdotr_compute()
 
 void Pair::write_file(int narg, char **arg)
 {
-  if (narg < 8) error->all(FLERR,"Illegal pair_write command");
+  if (narg != 8 && narg != 10) error->all(FLERR,"Illegal pair_write command");
   if (single_enable == 0)
     error->all(FLERR,"Pair style does not support pair_write");
 
diff --git a/src/region_block.cpp b/src/region_block.cpp
index f1787d2ca2..769edb1489 100644
--- a/src/region_block.cpp
+++ b/src/region_block.cpp
@@ -401,7 +401,7 @@ double RegBlock::find_closest_point(int i, double *x,
       zc = p[2];
     }
 
-    point_on_line_segment(corners[i][3],corners[i][4],x,p);
+    point_on_line_segment(corners[i][3],corners[i][0],x,p);
     d2 = (p[0]-x[0])*(p[0]-x[0]) + (p[1]-x[1])*(p[1]-x[1]) +
       (p[2]-x[2])*(p[2]-x[2]);
     if (d2 < d2min) {