diff --git a/libsrc/core/array.hpp b/libsrc/core/array.hpp
index e1aabdc1..36ae9fb9 100644
--- a/libsrc/core/array.hpp
+++ b/libsrc/core/array.hpp
@@ -1110,6 +1110,25 @@ namespace ngcore
       return *this;
     }
 
+    ArrayMem & operator= (ArrayMem && a2)
+    {
+      if (a2.mem_to_delete)
+        {
+          ngcore::Swap (mem_to_delete, a2.mem_to_delete);
+          ngcore::Swap (data, a2.data);
+          ngcore::Swap (allocsize, a2.allocsize);
+          ngcore::Swap (size, a2.size);
+        }
+      else
+        {
+          allocsize = S;
+          for (size_t i = 0; i < S; i++)
+            mem[i] = std::move(a2.mem[i]);
+        }
+      return *this;
+    }
+
+
     /// array copy
     ArrayMem & operator= (const FlatArray<T> & a2)
     {
diff --git a/libsrc/meshing/meshtype.cpp b/libsrc/meshing/meshtype.cpp
index 32402d43..e6865d50 100644
--- a/libsrc/meshing/meshtype.cpp
+++ b/libsrc/meshing/meshtype.cpp
@@ -7,18 +7,12 @@ namespace netgen
   int MultiPointGeomInfo :: 
   AddPointGeomInfo (const PointGeomInfo & gi)
   {
-    for (int k = 0; k < cnt; k++)
-      if (mgi[k].trignum == gi.trignum)
+    for (auto & pgi : mgi)
+      if (pgi.trignum == gi.trignum)
 	return 0;
   
-    if (cnt < MULTIPOINTGEOMINFO_MAX)
-      {
-	mgi[cnt] = gi;
-	cnt++;
-	return 0;
-      }
-
-    throw NgException ("Please report error: MPGI Size too small\n");
+    mgi.Append(gi);
+    return 0;
   }
   
 
diff --git a/libsrc/meshing/meshtype.hpp b/libsrc/meshing/meshtype.hpp
index fcb78f0c..dc297506 100644
--- a/libsrc/meshing/meshtype.hpp
+++ b/libsrc/meshing/meshtype.hpp
@@ -97,19 +97,22 @@ namespace netgen
 
 
 
-#define MULTIPOINTGEOMINFO_MAX 100
   class MultiPointGeomInfo
   {
-    int cnt;
-    PointGeomInfo mgi[MULTIPOINTGEOMINFO_MAX];
+    ArrayMem<PointGeomInfo, 100> mgi;
   public:
-    MultiPointGeomInfo () { cnt = 0; }
     int AddPointGeomInfo (const PointGeomInfo & gi);
-    void Init () { cnt = 0; }
-    void DeleteAll () { cnt = 0; }
+    void Init () { mgi.SetSize(0); }
+    void DeleteAll () { mgi.SetSize(0); }
 
-    int GetNPGI () const { return cnt; }
+    int GetNPGI () const { return mgi.Size(); }
     const PointGeomInfo & GetPGI (int i) const { return mgi[i-1]; }
+
+    MultiPointGeomInfo () = default;
+    MultiPointGeomInfo (const MultiPointGeomInfo&) = default;
+    MultiPointGeomInfo (MultiPointGeomInfo &&) = default;
+    MultiPointGeomInfo & operator= (const MultiPointGeomInfo&) = default;
+    MultiPointGeomInfo & operator= (MultiPointGeomInfo&&) = default;
   };