Game Cashes When Switching Weapons In A Mission

[Zakharon]

As the name suggests the last few days I played I can not switch from using my main weapon to sidearm or to melee without the game crashing, I am missing the event due to this issue.

Edit: I put this in mission well becuse it only happens in missions

Edited December 1, 2014 by Zakharon

[Rydian]

Close Warframe, start the launcher back up, and then click the gear icon in the upper-right.  In that menu, verify the cache.  The process might take a while, but should fix any corrupt game data.