# Crash on launch and/or preview... 7.5.1 **URL:** \ **Category:** RapidWeaver Classic\ **Created:** [September 29, 2017, 5:37am UTC](https://forums.realmacsoftware.com/t/crash-on-launch-and-or-preview-7-5-1/16457 "2017-09-29T05:37:03Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![instacks](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/instacks/32/23339_2.png) [@instacks](https://forums.realmacsoftware.com/u/instacks)\ **Post date:** [September 29, 2017, 6:12am UTC](https://forums.realmacsoftware.com/t/crash-on-launch-and-or-preview-7-5-1/16457/2 "2017-09-29T06:12:25Z")
Maybe related to this? > [@Error message in RW 7.5.1 when adding pages](http://forums.realmacsoftware.com/t/error-message-in-rw-7-5-1-when-adding-pages/16399/8): > > Hi Dan, thanks for getting back to me with this issue. Yes, it’s been happening with a blank project, when I add pages. So I’m sure it wouldn’t have helped a lot if I uploaded an empty project here. wink But the good news: the problem is solved! slight_smile The key to the solution was your hint with changing the theme. I had set „Foundation“ as the default theme for months (or years?) now. But when I changed the default theme to „Alpha“, then quit RW and restarted it, the issue was gone. … --- _[View the full topic](https://forums.realmacsoftware.com/t/crash-on-launch-and-or-preview-7-5-1/16457)._