滚动游标支持列表视图时崩溃

Like the title says, I have a listview populated with a cursoradapter. I can scroll the list just fine for the first 50 elements let's say, however it crashes if I try to scroll further, and it crashes always at the same point. I include the stack trace, it hasn't been very useful to me though: all the calls are made inside the android framework, so even though I know that the problem is a closed db at the end, I don't know which part of my code is the problem. Inside the same app I have other listviews based on cursors which do not pose any problem. I don't have any other ideas of the cause.Like the title says, I have a listview populate