Hi,
I've created a simple filter based on raw SQL. I used this filter in a Task.
After performing this task (task was completed) I tried to delete the Filter. But now way. you can't delete this filter.
I've tested it with another filter. The same happend. While deleting the console shows the Item References. But you can't delte them.
If you right click to delte "no menu"
Last year, there was an similar thread but without a solution.
https://www-secure.symantec.com/connect/forums/cannot-delete-filter-after-being-used-target