Problem in NIOS II IDE

[Altera_Forum]

My computer crashed while in NIOS II IDE. Upon rebooting and trying to re-build my project, I get the error "Managed build info not found. Project is invalid or .cdtBuild is corrupted." 

 When I go to properties->C/C++ Build, there is nothing in Platform or Configuration and I cannot figure out how to enter anything. The "Restore Defaults" button does nothing.  I retrieved an older .cdtBuild, .cdtProject, and .project from SourceSafe, but it made no difference.  How do I recover from this mess?  thanx

[Altera_Forum]

First thing I'd do is navigate to the folder with your application and copy those files somewhere else. Then create a new project and drop in those files. You should get a fresh set of project files from that.

[Altera_Forum]

I had this error several times. I think sometimes it comes from CVS, but sometimes I could not figure out any reason...  

 Today this error happened again, I resolved it by a simple right-click on my project, selected Refresh and subsequently Rebuild.