Leginon

Question from Gaya Yadav

There is something happens to my data collection session and Leginon quit. i tried to reopen the previous session 
but i lost all the information about exposure targeting.

Is there any way to restart the session if  it quit?

Because each step is recorded in the database, Leginon in general can restart and continue easily. For example, you can click "process queue" button in a node to make the next acquisition node to pick it up.

There is one exception which might be where you are. If you are doing queuing at "Exposure Targeting" node, verifying the targets manually one-by-one and allow "Hole" node Not to "wait for a node to process the image", the images acquired would accumulate in the computer memory if your targeting picking falls behind. When leginon quit, these image are cleared from the memory and can not recover automatically by Leginon when you restart.

There is a manual way to recover this. What we will do is to send the image and its associated information (we call publish) from "Hole" node. It is a bit involved. Here is how:
1. You need to know which images that are lost in the memory.
2. Go to "Hole" node.
3. Click on "publish image" at the far right of the toolbar.
4. You will see an Image Browser. Navigate to one of the image that you want to publish, and then click "Publish" button.
5. You should find "Exposure Targeting" displays the image and is waiting for you to verify the targets.
6. Repeat 2-4 for all images.

Be careful not to publish images not acquired by "Hole" node. The code was not written to validate it.