# Opening a project between an older and a newer version factory IO

**URL:** <https://community.factoryio.com/t/opening-a-project-between-an-older-and-a-newer-version-factory-io/1107>\
**Category:** Uncategorized\
**Created:** [October 24, 2021, 6:09pm UTC](https://community.factoryio.com/t/opening-a-project-between-an-older-and-a-newer-version-factory-io/1107 "2021-10-24T18:09:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![adixmos](https://avatars.discourse-cdn.com/v4/letter/a/eada6e/32.png) [@adixmos](https://community.factoryio.com/u/adixmos)\
**Post date:** [October 24, 2021, 6:09pm UTC](https://community.factoryio.com/t/opening-a-project-between-an-older-and-a-newer-version-factory-io/1107/1 "2021-10-24T18:09:01Z")

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I was working on a newer version of Factory IO (2.4.5) but now I have an older version(2.4.3), I can’t open the project,has a few bugs in the console:  
Welcome to the console. Type print\_help() to print a list of available commands.  
Failed to open Converge Station. Exception: System.NullReferenceException: Object reference not set to an instance of an object  
at GenericDriver.g\_\_ReadPoints|73\_0 (System.Xml.XmlNode n, System.String name, PointIO[] points) [0x0001c] in :0  
at GenericDriver.DoDeserialization (System.Xml.XmlNode node, System.Version version) [0x00300] in :0  
at AdvantechDriver.DoDeserialization (System.Xml.XmlNode node, System.Version version) [0x00000] in :0  
at DriverBase.Deserialize (System.Xml.XmlNode rootNode, System.Version version) [0x00011] in :0  
at DriverManager.Deserialize (System.Xml.XmlNode rootNode, System.Version version) [0x001a8] in :0  
at FactoryIO.Scripting.Scene.LoadSavedSceneData (System.Xml.XmlNode sceneNode) [0x00135] in :0  
at FactoryIO.Scripting.Scene.ExecuteLoad (FactoryIO.Scripting.Scene+SceneInfo savedScene) [0x0004e] in :0

Can someone help me, thank you