Reaper Crashes when rendering (Soundcard specific?)

Maybe somebody else has experienced this. I am running windows vista/Lexicon Lamda. Whenever I attempt to render a session I get an error message and then reaper shuts down. I figured it cant be a particular vst because I also have a Lexicon Omega and I have no problems when using that soundcard. I'm thinking the issue lies within the switching of the two soundcards. At home I use the Lexicon Omega because it is wall powered, has a few more outs and is pretty cumbersome to move around, when I'm away I use a Lexicon Lamda because its USB powered and more portable. I have updated drivers for both and I select the correct soundcard in the preference menu depending on which one I'm working on. Does anybody else have any experience with this issue? Any help is greatly appreciated. Thanks!

Reaper crashes on rendering complex projects 

Reaper consistently crashes while closing the render dialog window on complex projects using several soft synths. I think it's trying to complete the wav file. So I unchecked the "close window" box, wait a few minutes, then close Reaper using Task Manager. Not a satisfactory solution, but it allows me to complete the project and move on.

i had this problem recently.

All. The damn. Time. My only workaround is doing an online realtime render, and I'm forced to on several projects. Shouldn't need to though.

Reaper has always crashed about a quarter of the time when I render. The more tracks and plug-ins that I have, the more likely it seems to be. I just make sure I always save first, and if necessary I write some of the fx to the tracks and delete the plug-ins.

which version of Reaper ??

The same in OS X 

Everytime im trying to render my project, the rendering window comes out, and crashes.. I have tried to open other projects, and then go back to the original project, just to see the same thing happen all over again.. Is it perhaps the plugins im using?.. Im a big fan and user of Tone 2's ElectraX..

It's most likely a plug-in, some plug-ins don't like rendering faster than realtime for example (so using "Online render" is the first step to troubleshoot). As always with crashes, the crash log / Crash Reporter log is essential for troubleshooting the issue. Please check this thread about crash logs and how to retrieve them: