I'm excited to find a OS alternative to MS Project, so I started planning - but:
I cannot make the cost rollup work reliably. I have one- to two-level task hierarchies, and assign "Fixed Cost" to the lowest-level tasks. In some cases, they are rolled up to the top-level task, but in most cases, they are not. Even with a single top-level task, rollup seems to depend on the sequence of entering subtask costs, and whether only one subtask has non-zero cost (rolled up to top-level task) or several subtasks have non-zero costs (only first entered is rolled up, or nothing is rolled up).
I've looked through documentation, discussions, field catalog, XML file format - the only hint I found was an XML attribute called "rollup", which is 0 for all entries in the XML export - even for the one where rolling up worked.
I do not (yet) need the hours/rate calculation, because the most important case is material cost, which is not depending on duration - that's why I used "Fixed Costs".
So - is there an automatic way of adding costs of subtasks to the top-level tasks?
Thanks a lot, nobi