I talked with Steve Hughes about this particular issue and he raised a very good point. He mentioned that this issue is not necessarily a bug. Its just that the option of adding tank fuel mass is missing in the GUI world. Before you begin to work on this issue, could you please tell me that approximately how long would it take for you to fix this issue?
If this issue takes you more than 5-6 hours to resolve, then we should not work on this issue. Rather as Steve Hughes and I discussed that it is OK for us to not have this GUI capability as we cannot translate every single capability that we have in script world into the GUI world.
So solution to this issue would be that I would simply mention in the FRR-30 Spec document that reporting fuel mass is not available via GUI and that the user must use the script in order to access fuel mass variable. This is a quick fix solution to this, as oppose to you spending your valuable time in fixing this issue, especially if this issue will take you more than 5-6 hours to resolve.
Please let me know. Thanks!