Stuck Again

Aborting a task kills it completely.  You can't 'reload' it.

For future reference, if something seems 'stuck' like this, you should just stop BOINC, wait a few seconds and then try restarting BOINC.  The purpose of that is to remove the task from memory and force BOINC to reload it from the last saved checkpoint (which will be on disk) and thereby give it a chance to get past where it was previously 'stuck'.

If that is still unsuccessful, you should shut down the computer and then restart it.  The purpose of that is to allow a fresh set of system libraries, etc, to be loaded, in case the problem is a system problem rather that an app problem.

In many cases (perhaps including this particular one) you may find the task can then be completed.  Here is the very end of what was returned to the project after you aborted the task.  You can check the whole thing for yourself by clicking on the Task ID link for the failed task - as shown on the website.

2020-04-26 16:53:22.7633 (9920) [normal]: Finished main analysis.
2020-04-26 16:53:22.7633 (9920) [normal]: Recalculating statistics for the final toplist...
2020-04-26 16:54:39.8643 (9920) [normal]: Finished recalculating toplist statistics.
2020-04-26 16:54:39.8663 (9920) [debug]: Writing output ... toplist2 ... toplist3 ...
</stderr_txt>

The calculations were completely finished and some results stats were being prepared to be written to several files for return to the project.  You can see that in just over a minute, that stage (the 99% to 100% stage) had been completed and files were being written out.  Two files were written but there were more to come.  Something stalled in the writing of the next file.  Writing files to disk is a system process.  Rebooting the machine may very well have cleared whatever was causing that to get stuck.  It would certainly have been worth a try.

It's not easy to know the problem in advance of the results being returned.  You just have to remember to try the standard techniques to get past a blockage before resorting to the 'final solution' :-).