Hello,
Can you give a few more specifics about the problem? Does it close immediately when you open Eclipse, or after some specific set of actions? Is this a new or recent installation, or have you been successfully using the software for a while, and this problem has just recently started occurring? On which operating system version is this happening? Are you using the Eclipse installation that was provided with Visual COBOL, or have you added Visual COBOL to an existing separate Eclipse installation?
Also, please let me know the exact Visual COBOL for Eclipse product version number, which you can see in Eclipse under Help->Micro Focus->Product Information.