I've just noticed an oddity.
I have one job that has just run to completion (the only one to run successfully in the last week or so).
This was using sr1sieve_1.4.7.1_aarch64.
The jobs that fail are running sr1sieve_1.4.5_aarch64.
And when I look at the log on the system it contains:
Thu 14 Jan 2021 13:03:29 GMT | yoyo@home | Started download of sievewrapper_145.03_aarch64-unknown-linux-gnu
Thu 14 Jan 2021 13:03:29 GMT | yoyo@home | Started download of sr1sieve_1.4.5_aarch64
Thu 14 Jan 2021 13:03:31 GMT | yoyo@home | Finished download of sr1sieve_1.4.5_aarch64
Thu 14 Jan 2021 13:03:31 GMT | yoyo@home | Started download of sr1_6150500000000000-6151000000000000-b10k95-1610490428-2301.in
Thu 14 Jan 2021 13:03:32 GMT | yoyo@home | Finished download of sr1_6150500000000000-6151000000000000-b10k95-1610490428-2301.in
Thu 14 Jan 2021 13:03:32 GMT | yoyo@home | Started download of sr1_6150500000000000-6151000000000000-b10k95-1610490428-2301.xml
Thu 14 Jan 2021 13:03:33 GMT | yoyo@home | Finished download of sievewrapper_145.03_aarch64-unknown-linux-gnu
but when I look at the project directory on the system
after this I only see:
[asus]: pwd
/opt/BOINC/wlib/projects/www.rechenkraft.net_yoyo
[asus]: ls
./
../
default_stat_icon_01.png
ecm_01.png
evo_01.png
m-queens_0.01_aarch64-unknown-linux-gnu*
muon_01.png
ogr_01.png
rkn_01.png
sievewrapper_147.02_aarch64-unknown-linux-gnu*
slideshow_00
slideshow_01
slideshow_02
slideshow_03
slideshow_04
sr1sieve_1.4.7.1_aarch64*
sr2sieve_1.9.3.1_aarch64*
stat_icon
i.e. the executable which was apparently downloaded is no longer there.