Thanks for letting us know there is a problem. This functionality is supported by ORM Designer, so we need to check this and fix it. Please provide few details so we can identify the cause asap.
Does this happen every time you export your model? Please, could you send us the smallest/simplest schema file which, when import/exported will cause the problem? This will help us to find out if there is problem in the parser and what kind.
You can send the schema file to [email protected] Don't worry, if it is a piece of an actual project, we will treat it as confidential and only use it to troubleshoot the situation.