History tab

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You first have to enable the history tab! Go to Extra -> Settings BoincTasks -> History and check "Enable history logging"

More information about the history in the BoincTasks setting dialog.


What tasks are displayed?
All tasks from upload to the time set for delete.

If you see a * after Reported OK it means the task is last seen in uploading, nothing to worry about.
A + means the tasks was missed but recovered from the BOINC client.

What about Missed? Missed isn't an error but BoincTasks didn't seen the tasks going from Running to "Uploading" or "Ready to report".
As of BOINC 7.2.23 BoincTasks is able to retrieve missed tasks. You need to set history mode to "smart mode" (default)

If you run an older BOINC version and you see a lot of Missed change the following setting:

In BoincTasks Settings->History set "Minimum update time" lower e.g. to 2 seconds and enable "Smart mode".

Long term history

If you have a lot of tasks in the history, it may be wise to move them to long term History.
Extra->BoincTasks settings->History.
Enable "Move to long term history after" 0 hours.

Use: Show->Long term history to view the history.
You can filter on computer/project and time period.

Files
History files are stored in the default (xml) directory. You can modify this folder in Extra->Settings->Expert->Override default (xml) Folder.
In Vista/Win7 the default folder location is C:\Users\[username]\AppData\Roaming\eFMer\BoincTasks\history
In XP c:\documents and settings\[username]\Application Data\eFMer\BoincTasks\history
Don't open any file while BoincTasks is running, but make a copy and open the copy instead.

The name is history_filename.cvsx. There are 3 copies cvs is the most recent, followed by cvs1 and cvs2.
When updating the history cvs2 is deleted, cvs1 is renamed cvs2, cvs is renamed cvs1 and at last cvs is the new history file.

The file format is:
LINE 1: x.xx  <BoincTasks version>
LINE 2: xxxxxxx <The computer name, as used in the file name>
LINE 3: BoincTasks History <This string is checked to assure a valid file>
LINE 4: <Comment line>
LINE 5: <Data lines, they start with the number 1> <The numbers are checked to assure a valid file>
LINE FORE LAST: <Highest id number,  checked to assure a valid file>
LINE LAST: Check! <This string is checked to assure a valid file>
Even small changes in the file can make the file invalid!