On Pro 9.8, try this to reproduce the issue:
- 1. Make a ePim Task list with subtasks in the tree.
2. Export the list as iCal (*.ics)
3. Import this same list to ePim Tasks
4. The subtask tree structure is lost. No hierarchy.
Most commonly the missing info is something of this sort: RELATED-TO;RELTYPE=PARENT:[UID]
So, if I manually add the missing lines to the exported file eg: "RELATED-TO;RELTYPE=PARENT:335646195907274085", then import works as expected, and the tree structure is preserved in, for instance, ToDoList (by Abstractspoon).
But ePim still imports the Tasks as a Plain list with no hierarchy, even with relational information properly present in the .ics file.
A solution would be greatly appreciated!