--- libgig/trunk/src/gig.cpp	2007/03/08 16:41:27	1083
+++ libgig/trunk/src/gig.cpp	2007/03/18 07:13:06	1102
@@ -2152,6 +2152,8 @@
                 if (file->pWavePoolTable) pDimensionRegions[i]->pSample = GetSampleFromWavePool(wavepoolindex);
             }
             GetSample(); // load global region sample reference
+        } else {
+            DimensionRegions = 0;
         }
 
         // make sure there is at least one dimension region
@@ -2740,12 +2742,17 @@
     }
 
     Group::~Group() {
+        // remove the chunk associated with this group (if any)
+        if (pNameChunk) pNameChunk->GetParent()->DeleteSubChunk(pNameChunk);
     }
 
     /** @brief Update chunks with current group settings.
      *
-     * Apply current Group field values to the respective. You have to call
-     * File::Save() to make changes persistent.
+     * Apply current Group field values to the respective chunks. You have
+     * to call File::Save() to make changes persistent.
+     *
+     * Usually there is absolutely no need to call this method explicitly.
+     * It will be called automatically when File::Save() was called.
      */
     void Group::UpdateChunks() {
         // make sure <3gri> and <3gnl> list chunks exist
@@ -3176,6 +3183,30 @@
         }
     }
 
+    /**
+     * Apply all the gig file's current instruments, samples, groups and settings
+     * to the respective RIFF chunks. You have to call Save() to make changes
+     * persistent.
+     *
+     * Usually there is absolutely no need to call this method explicitly.
+     * It will be called automatically when File::Save() was called.
+     *
+     * @throws Exception - on errors
+     */
+    void File::UpdateChunks() {
+        // first update base class's chunks
+        DLS::File::UpdateChunks();
+
+        // update group's chunks
+        if (pGroups) {
+            std::list<Group*>::iterator iter = pGroups->begin();
+            std::list<Group*>::iterator end  = pGroups->end();
+            for (; iter != end; ++iter) {
+                (*iter)->UpdateChunks();
+            }
+        }
+    }
+
 
 
 // *************** Exception ***************