Questions and Answers: Closed Question
Status: Closed
Anonymous @ 03:40 PM on 27 Jan, 2010
No plots outputted with default settings. The only result seems to be plain text.
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Status: Closed
Anonymous @ 03:40 PM on 27 Jan, 2010
No plots outputted with default settings. The only result seems to be plain text.
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Benjamin P Haley @ 11:03 AM on 28 Jan, 2010
Thanks for the notice. Do you still see no output plots? When I run the tool with the default settings, I see all the band structure plots as well as the unit cell and lattice atomic visualizations.
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Daniel Gottesman @ 12:56 PM on 28 Jan, 2010
Still no…
All I see in the the output drop down menu is: Input Deck Backend (OMEN) Run Log Log of Time Stamps Tool Run Log Download
All plain text, no plots.
The backend log seems to show a weird error:
p4_error: create_procgroup: username is too long: 0
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Daniel Gottesman @ 09:48 PM on 28 Jan, 2010
Based on the error, I attempted to change my username. Apparently there is no way to actually change an existing username.
I decided to make a second account with a MUCH shorter username (same e-mail and contact info) and it works perfectly.
Very strange bug that probably has simple fix.
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Benjamin P Haley @ 08:40 AM on 29 Jan, 2010
That is a strange bug. The p4_error message implies that the OMEN simulations never ran, due to an MPICH error, so only the basic text output was produced. Perhaps the username is used to create an identifier for the parallel jobs. I’ll talk to our system programmers about this. Thanks for letting us know.
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Benjamin P Haley @ 07:44 AM on 02 Feb, 2010
Following up: the problem is in MPICH. The data structures used to track parallel simulations allow only a 16 character username. The simulations never ran, because MPICH choked. We are planning to rebuild MPICH to allow 32 character names, to match the nanoHUB limit.
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