Jcreator error help

[Sage]

theres an error that pop ups when i try to run my program in jcreator it says that the file has been manipulated what should I do:confused:

[Fubarable]

theres an error that pop ups when i try to run my program in jcreator it says that the file has been manipulated what should I do:confused:

Give us more information, a LOT more information, including code, the exact error message, and the line of code that is throwing the error message for starters.

Much luck!