diff --git a/libs/memman.c b/libs/memman.c
index 4a2f075..0fd8921 100644
--- a/libs/memman.c
+++ b/libs/memman.c
@@ -178,8 +178,12 @@ static TNAMETABLE_REF load_file_table(const void *bmf_m)
   const uint32_t *src_table = (const uint32_t *)bmf_m;
   uint32_t grptabsiz = src_table[1];
   TNAMETABLE_REF out;
-  out.data = (const TNAMETABLE *)((const char *)bmf_m + grptabsiz);
-  out.count = (out.data[0].seek - grptabsiz)/sizeof(TNAMETABLE);
+  const TNAMETABLE *ptr = (const TNAMETABLE *)((const char *)bmf_m + grptabsiz);
+  size_t count = (ptr[0].seek - grptabsiz)/sizeof(TNAMETABLE);
+  TNAMETABLE *tbl = NewArr(TNAMETABLE, count);
+  memcpy(tbl,ptr, count * sizeof(TNAMETABLE) );
+  out.data = tbl;
+  out.count = count;
   return out;
   }
 
@@ -345,6 +349,7 @@ void reload_ddls(void) {
             }
             dinfo->ptr = bmf;
             dinfo->size = bmf_s;
+            ablock_free(dinfo->nametable.data);
             dinfo->nametable = load_file_table(bmf);
         }
     }
@@ -641,8 +646,9 @@ void close_manager()
      for(j=0;j<BK_MINOR_HANDLES;j ++) undef_handle(i*BK_MINOR_HANDLES+j);
      free(_handles[i]);
      }
-  for (int i = 0; i < MAX_PATCHES; ++i) {
+  for (int i = 0; i < MAX_PATCHES; ++i) if (ddlmap[i].ptr) {
       unmap_file((void *)ddlmap[i].ptr, ddlmap[i].size);
+      ablock_free(ddlmap[i].nametable.data);
       free(ddlmap[i].path);
   }
 
diff --git a/platform/windows/map_file.cpp b/platform/windows/map_file.cpp
index e40fbcd..7b7ab29 100644
--- a/platform/windows/map_file.cpp
+++ b/platform/windows/map_file.cpp
@@ -20,7 +20,7 @@ const void* map_file_to_memory_cpp(const char *name, size_t *sz) {
 
     std::filesystem::path p(reinterpret_cast<const char8_t *>(name));
 
-    HANDLE h = CreateFileW(p.c_str(), GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_DELETE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
+    HANDLE h = CreateFileW(p.c_str(), GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_DELETE|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
     if (h == INVALID_HANDLE_VALUE) throw std::runtime_error(std::string("Failed to open file for mapping: ")+p.string());
 
     LARGE_INTEGER fsize;