Hi Folks, On my way to Linux migration journey, Everything seemed ok until compiling Custom developed forms and test them. They are compiled without errors but when i try to query on them, they gibe ORA-00904 errors but i do not get these errors on Windows environment. I also realized that Some hidden buttons act as if they are database columns. I think ORA*00904 errors are because of this. Tries to select hidden buttons because it thinks it is a database column! What may be the reason of behaving different on linux and windows? I will be gratefull if someone have idea about this issue! Regards, Kenan --------------------------------- Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out.