Strange compile error

Hello,

I get this error when the program compiles, when the message box asks me to continue i can click yes and the program will still run. However, l would like to get rid of this error.

The only things l have done before l got this error was changing the startup object in the project properties and changing the Void main into another form. Thats all l think.

"Could not open incremental build file 'C:\IBS
LibrarySystem\LibrarySystem\obj\Debug\LibrarySystem.exe.incr' for writing"

Hope someone can help me,

Steve

Does this apply?