I'm using NetExpress 5.0 since... yesterday. I used Netexpress 3.1 many years ago.
I cam compile all my project, after its conversion, but I can't obtain the exe file i DON'T KNOW WHY.
Anybody can help me?
The educational versions of Net Express do have a limit of 2200 lines as they are meant to be used in a limited capacity. If you want to do any serious development you will have to get a fully licensed version of the product.
Net Express 3.1 and 5.0 are very old products and are not supported anymore. The latest product line is Visual COBOL which supports all the latest operating systems. There is a Personal Edition version of Visual COBOL which is free and is used for education purposes.
If you are not seeing any errors and no .exe is being generated then you might try compiling from the command line using the cbllink command as this may provide a more robust error message for you.