io_mesh_uv_layout/__init__.py

@@ -136,8 +136,12 @@ class ExportUVLayout(bpy.types.Operator):
                 obj_eval.to_mesh_clear()
 
         export = self.get_exporter()
+        try:
             export(filepath, polygon_data, different_colors, self.size[0], self.size[1], self.opacity)
-
+        except ValueError as ex:
+            self.report({'ERROR'}, str(ex))
+            return {'CANCELLED'}
+        finally:
             if is_editmode:
                 bpy.ops.object.mode_set(mode='EDIT', toggle=False)
 

io_mesh_uv_layout/export_uv_png.py

@@ -16,8 +16,11 @@ except ImportError:
 
 
 def export(filepath, face_data, colors, width, height, opacity):
+    try:
         offscreen = gpu.types.GPUOffScreen(width, height)
         offscreen.bind()
+    except RuntimeError:
+        raise ValueError("Texture allocation failed. Try using a smaller size for export.")
 
     try:
         fb = gpu.state.active_framebuffer_get()