List of debugging tools + documentation

It would be useful to have a list of existing debugging tools and their documentation.
It seems that some tools exist in CAM (like snapshot) but scientists are not necessarily aware of them.

Useful tools would be:
- be able to close the history file just before crashing point. Right now, we are outputting a history file at every timestep and we are adding variables to debug. But they are not saved just before the model crashes because the history file is not closed. In the telecon, Steve mentioned there are ways to close the file. When can I find info about that.
- subroutine to output lat/lon of a crashing point.

Thanks !