I used the 1229 to extract the 1229 zip to C:\NXP\bstudio_nxp\workspace。
There were no problems after the first Bulid all.But if I delete the project and import BUlid all again here, a lot of errors will occur.What should I do?
befor first project ->Bulid all 
after project ->Bulid all

If you delete a project and repeat the above operation, many errors will occur
project ->Bulid all

What should I do to be free from mistakes?