https://forge.codesys.com/forge/talk/Engineering/thread/a715884e6e/2020-02-27T13:57:41.473000ZRecent posts to Fail starting Codesys 3.52020-02-27T13:57:41.473000Z2020-02-27T13:57:41.473000Zsingletonhttps://forge.codesys.com/u/singleton/https://forge.codesys.comf8c7f4a912cead764efd3fa106b97a5153646024

<div class="markdown_content"><p>Hi,<br/> just delete the file 'C:\ProgramData\CODESYS\CODESYSProjectDefaults.opt'.<br/> It will be recreated automatically.</p></div>

2020-02-27T13:57:41.229000Z2020-02-27T13:57:41.229000ZAnonymoushttps://forge.codesys.com/u/*anonymous/https://forge.codesys.com9391b01d7f4cd2cdfa19208c01457378f08dda97

<div class="markdown_content"><p><em>Originally created by:</em> Francisco Soriano</p> <p>My Codesys 3.5 worked fine for a few months. Now it does not work and when trying to start it shows the message:</p> <p>"Failed to istantiate the frame window. The option file 'C:\ProgramData\CODESYS\CODESYSProjectDefaults.opt' could not be loaded. (Reason: Root element is missing'.) The application will be terminated."</p> <p>I have unistalled Codesys and erased the folder ‘C:\Program Files (x86)\3S CODESYS’ several times but when reinstalling the software I get always the same error.</p> <p>I use Windows 7 and I have in the same computer simultaneously Codesys 2.3 and Codesys 3.5.</p> <p>Any help?</p></div>