If you have Enterprise Developer and Net Express or Studio Enterprise Edition installed on the same machine, you sometimes receive a run-time system error if either the COBCONFIG or COBCONFIG_ environment variable is set when you run Enterprise Developer applications the configuration file it refers to contains entries that are not valid for Enterprise Developer.
To work around this issue, ensure that Enterprise Developer is not running and then modify the configuration file by doing one of the following:
set cobconfig_error_report=false