LHC@home

From the last batch of WU's, I have about 90 that were 'awarded' with : Completed, marked as invalid.
If you look at for example task 47575574, the reports are:

Name w2_jobhllhc10_inj_400_w2__11__s__62.28_60.31__8_10__5__82.5_1_sixvf_boinc8503_1
Workunit 22448500
Created 24 Oct 2014, 16:42:28 UTC
Sent 24 Oct 2014, 22:55:22 UTC
Received 25 Oct 2014, 7:46:47 UTC
Server state Over
Outcome Success
Client state Done
Exit status 0 (0x0)
Computer ID 10283316
Report deadline 1 Nov 2014, 14:27:36 UTC
Run time 4,695.46
CPU time 4,454.09
Validate state Invalid
Credit 0.00
Application version SixTrack v451.07 (pni)

and Stderr output looks like this:

<core_client_version>7.2.42</core_client_version>
<![CDATA[
<stderr_txt>
09:26:33 (5548): called boinc_finish

</stderr_txt>
]]>

My wingmen show the same output, but their results are valid (thus the Validate state).
Maybe somebody can shine a light on this.
Thanks, Ruud

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Sorry Ruud; just spotted your message. I shall try and figure
out what is going on. Eric.

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Right, I checked logs and indeed the results is invalid.

Cryptic message is
2014-10-25 11:27:31.9695 [debug] [RESULT#47575573 47575574] WU#0 HOST[10333141 10283316] differ: 11 1.0314171966464152e+000 8.6509219752258399e+000 p=0 V: 40517.000000000000e+000 40517.000000000000e+000

This is a real numeric difference; two other Hosts gave the same
hopefully correct result. The 11 refers to word 11 in the fort.10
results summary and is the "maximum slope in phase space" which happens
to be the most sensitive to any small numeric difference.

If this is happening a lot I shall need to check your Host, as I do
NOT expect numeric diffs. A one off can just be a memory error or similar
glitch.
Eric.

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