I am running AP on Linux 64bit and they always seem to have Computation errors at random points. Most recently my cpu had spent 40 hours crunching on one and was more than 95% complete when the error occurred. Is anyone else having similar problems?

You seemingly are not alone, see here.

For an explanation of the error, see this message. (I did a forum search for SIGSEGV.)

Gruß,
Gundolf

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Computer sind nicht alles im Leben. (Kleiner Scherz)

SETI@home classic workunits 3,758
SETI@home classic CPU time 66,520 hours

Thanks at least i know im not alone in my problems.

Maybe there is a second problem with AP-WUs.
Seams that Matt has done too good with his radar clearing scripts?
Just get one of the rare AP 5.05 WUs - finished in under 4 sec. - uploaded it and get credits at once (0.01 of course) because of wingman also finished in under 3 sec. with same result. An error message appears in the task description:

Error in ap_remove_radar.cpp: generate_envelope: num_ffts_performed < 100. Blanking too much RFI?

__W__

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Maybe there is a second problem with AP-WUs.
Seams that Matt has done too good with his radar clearing scripts?
Just get one of the rare AP 5.05 WUs - finished in under 4 sec. - uploaded it and get credits at once (0.01 of course) because of wingman also finished in under 3 sec. with same result. An error message appears in the task description:

Error in ap_remove_radar.cpp: generate_envelope: num_ffts_performed < 100. Blanking too much RFI?

__W__

Hmm, ap_23jl09aa_B3_P1_00007_20090823_28160.wu.

It may be the problem discussed in Astropulse Beam 3 Polarity 1 Errors has returned, worth watching.

                                                                Joe

For someone who knows and want to do some research, it was the WU http://setiathome.berkeley.edu/workunit.php?wuid=495685869.
__W__

Edit: Uuupps - the WU disapeared just from my valid task list ???
Name of the WU was ap_16ja08af_B0_P0_00163_20090821_05880.wu

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Just got the same problem 2 days ago

Here the report I took from stdoutdae.txt

[08/24/09 22:05:30] TRACE [2388]: Event: CTRL-LOGOFF Event

24-Aug-2009 22:05:31 [---] Exit requested by user
25-Aug-2009 07:14:00 [---] Starting BOINC client version 6.6.36 for windows_intelx86
25-Aug-2009 07:14:00 [---] log flags: task, file_xfer, sched_ops
25-Aug-2009 07:14:00 [---] Libraries: libcurl/7.19.4 OpenSSL/0.9.8j zlib/1.2.3
25-Aug-2009 07:14:00 [---] Data directory: C:\Documents and Settings\All Users\Application Data\BOINC
25-Aug-2009 07:14:00 [---] Running under account BaTaMHaCKeR
25-Aug-2009 07:14:00 [---] Processor: 2 GenuineIntel Genuine Intel(R) CPU T2300 @ 1.66GHz [x86 Family 6 Model 14 Stepping 8]
25-Aug-2009 07:14:00 [---] Processor features: fpu tsc pae nx sse sse2 mmx
25-Aug-2009 07:14:00 [---] OS: Microsoft Windows XP: Professional x86 Edition, Service Pack 3, (05.01.2600.00)
25-Aug-2009 07:14:00 [---] Memory: 502.11 MB physical, 1.19 GB virtual
25-Aug-2009 07:14:00 [---] Disk: 18.63 GB total, 5.38 GB free
25-Aug-2009 07:14:00 [---] Local time is UTC +7 hours
25-Aug-2009 07:14:00 [---] No CUDA devices found
25-Aug-2009 07:14:00 [---] No coprocessors
25-Aug-2009 07:14:00 [---] Not using a proxy
25-Aug-2009 07:14:00 [SETI@home] URL: http://setiathome.berkeley.edu/; Computer ID: 5063876; location: (none); project prefs: default
25-Aug-2009 07:14:00 [---] No general preferences found - using BOINC defaults
25-Aug-2009 07:14:00 [---] Reading preferences override file
25-Aug-2009 07:14:00 [---] Preferences limit memory usage when active to 251.05MB
25-Aug-2009 07:14:00 [---] Preferences limit memory usage when idle to 451.89MB
25-Aug-2009 07:14:00 [---] Preferences limit disk usage to 5.33GB
25-Aug-2009 07:14:00 [SETI@home] Restarting task ap_14jl09ae_B5_P0_00295_20090819_31139.wu_2 using astropulse_v505 version 505
25-Aug-2009 07:14:00 [SETI@home] Restarting task ap_23jl09aa_B5_P1_00327_20090823_20329.wu_1 using astropulse_v505 version 505
25-Aug-2009 07:14:00 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:14:00 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:14:05 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:15:05 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:15:05 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:15:06 [---] Project communication failed: attempting access to reference site
25-Aug-2009 07:15:07 [---] BOINC can't access Internet - check network connection or proxy configuration.
25-Aug-2009 07:15:10 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:16:11 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:16:11 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:16:16 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:17:16 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:17:16 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:17:21 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:18:21 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:18:21 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:18:26 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:19:26 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:19:26 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:19:31 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:20:31 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:20:31 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:20:36 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:21:36 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:21:36 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:21:41 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:22:41 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:22:41 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:22:46 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:23:46 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:23:46 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:23:51 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:24:51 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:24:51 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:24:56 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:25:56 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:25:56 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:26:01 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:27:01 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:27:01 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:27:06 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:28:06 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:28:06 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:28:11 [SETI@home] Scheduler request failed: Couldn't resolve host name
25-Aug-2009 07:29:11 [SETI@home] Sending scheduler request: To report completed tasks.
25-Aug-2009 07:29:11 [SETI@home] Reporting 2 completed tasks, not requesting new tasks
25-Aug-2009 07:29:27 [SETI@home] Scheduler request completed
25-Aug-2009 11:55:19 [SETI@home] Task ap_14jl09ae_B5_P0_00295_20090819_31139.wu_2 exited with zero status but no 'finished' file
25-Aug-2009 11:55:19 [SETI@home] If this happens repeatedly you may need to reset the project.
25-Aug-2009 11:55:20 [SETI@home] Restarting task ap_14jl09ae_B5_P0_00295_20090819_31139.wu_2 using astropulse_v505 version 505
[08/25/09 12:20:32] TRACE [2276]: ***** Console Event Detected *****

That is no error, only a warning. If it doesn't occur too often, just ignore it. I get this message up to twice a day, since my system clock is updated automatically just as often. One reason for this "error" to occur is when you adjust the system time in the wrong direction for more than 30 seconds.

Gruß,
Gundolf

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Computer sind nicht alles im Leben. (Kleiner Scherz)

SETI@home classic workunits 3,758
SETI@home classic CPU time 66,520 hours

thanks =)

Hmm, ap_23jl09aa_B3_P1_00007_20090823_28160.wu.

It may be the problem discussed in Astropulse Beam 3 Polarity 1 Errors has returned, worth watching.

                                                                Joe

I don't know if the problem extended into July, but they've found another tape from the original batch to split for Astropulse: ap_07mr08ab_B3_P1_00058_20090901_24888.wu