Hi all,

I am currently using Energy Plus V9-1 for my thesis project. I need V9-1 because I am using a model of a building that was developed on that version of the software and has not been updated since.

I have been using the software successfully over the past few months and up until this week everything was working perfectly.

Today I have tried to access the IDF editor and it is not working. When I open it on it's own or using EPLaunch only a white screen comes up for the logo in the task bar and no window comes up.

I have restarted the computer and used the methods in this link https://unmethours.com/question/42941.... Another link (https://unmethours.com/question/38942...) details downloading older version of EP to try and fix the problem but I am unsure if that would help considering it was working fine until today.

Does anyone have any ideas as to how I could solve this. I am a new user to this site therefore It won't allow me to upload a photo of the problem, but it is the same as to the photo shown in the first link. The problem is delaying my progress so I would appreciate any help.

(P.S I have tried the alt + tab method and the "cascade windows method" previously stated)

Thanks!