[#23035] Obj export crash

check for an active object before switching modes.

release/scripts/io/export_3ds.py

@@ -941,6 +941,7 @@ def save_3ds(filename, context):
     sce = context.scene
 #	sce= bpy.data.scenes.active
 
+    if context.object:
         bpy.ops.object.mode_set(mode='OBJECT')
 
     # Initialize the main chunk (primary):

release/scripts/io/export_fbx.py

@@ -305,6 +305,7 @@ def write(filename, batch_objects = None, \
         BATCH_OWN_DIR =				False
     ):
 
+    if bpy.context.object:
         bpy.ops.object.mode_set(mode='OBJECT')
 
     # ----------------- Batch support!

release/scripts/io/export_obj.py

@@ -823,6 +823,7 @@ def do_export(filepath, context,
     orig_scene = context.scene
 
     # Exit edit mode before exporting, so current object states are exported properly.
+    if context.object:
         bpy.ops.object.mode_set(mode='OBJECT')
 
 #	if EXPORT_ALL_SCENES:

release/scripts/io/export_ply.py

@@ -99,6 +99,7 @@ def write(filename, scene, ob, \
 
     Window.WaitCursor(1)
     """
+    if scene.objects.active:
         bpy.ops.object.mode_set(mode='OBJECT')
 
     #mesh = BPyMesh.getMeshFromObject(ob, None, EXPORT_APPLY_MODIFIERS, False, scn) # XXX

release/scripts/io/export_x3d.py

@@ -1157,6 +1157,7 @@ def x3d_export(filename,
     scene = context.scene
     world = scene.world
 
+    if scene.objects.active:
         bpy.ops.object.mode_set(mode='OBJECT')
 
     # XXX these are global textures while .Get() returned only scene's?