Yesterday i found a strange thing about the property : i downloaded a demo from network , and it made an error like "Error!: warnings treated as errors". So i went to the project property to see the properties and i found that the property "treat warning as error" was choosed in the compile property. So i canceled the option and rebuilded the project, but the error was still .
The reason was that the option was choosed again.
Why i couldn't change the options of the compile property? I have tested the project in different PC , and the problem is also.
By the way, I can change the other project properties, such as Resources, Application,and so on
Thank you very much !