Comments for Assigned variables in custom domains

Hi,

When I tried to generate define.xml 2.0 using OpenCDISC community 2.0.1, an error came out as "Uh oh, a serious error has occurred...; To ensure proper functioning, the application must be restarted. We apologize for the inconvenience, and would like to prevent this from happening in the future".

I happen to find out that after removing comments for those variables with Origin not equal to "Derived" from custom domains, this error was gone.

May I ask how can I keep comments for Assigned variables (e.g., VISITNUM, --TESTCD) in custom domains (e.g., named XB, XC from findings class) without adding value level metadata?

Thanks very much in advance!

Lenny