fix 2 bugs

- fix viewer throw decorate error when a graph don't contain any bb
- fix export data error when Virtools face unrecongized data type

SuperScriptViewer/DecoratorCore.py

@@ -145,6 +145,7 @@ def buildBlock(exDb, deDb, target, currentGraphBlockCell):
         else:
             layer_height[curLayer] = max(layer_height.get(curLayer, 0), bbResult[i].height)
     layer_height[arrangedLayer] = layer_height.get(arrangedLayer, 0) # make sure misc bb height exist
+    layer_height[2] = layer_height.get(2, 0)    # make sure at least have a bb layer (when there are no bb in a map)
 
     # calc bb Y
     baseY = dcv.GRAPH_CONTENTOFFSET_Y

SuperScriptViewer/SuperScriptViewer.py

@@ -4,7 +4,7 @@ import os
 import sys
 
 # debug use
-os.remove('decorate.db')
+# os.remove('decorate.db')
 
 print('Super Script View')
 if not os.path.isfile("decorate.db"):