Differences

This shows you the differences between two versions of the page.

--- huibintemaspamfaq [2018/12/08 00:35] – huibintema
+++ huibintemaspamfaq [2019/06/18 05:24] – huibintema
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 ===== SPAM frequently asked questions =====
-This ever-expanding section is based on user feedback. For questions on installing SPAM, see [[huibintemaspaminstall|this page]]. If you encounter a problem not listed below, please feel free to [[intema@strw.leidenuniv.nl|contact me]].
+This ever-expanding section is based on user feedback. For questions on installing SPAM, see [[huibintemaspaminstall|this page]]. If you encounter a problem not listed below, please feel free to [[huib.intema@curtin.edu.au|contact me]].
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 ==== Problems running SPAM on new Intel CPUs, possibly after Linux update ====
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 Q: Why doesn't the SPAM pipeline work (anymore), with AIPS generating NaNs in certain tasks?
-A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[ftp://ftp.strw.leidenuniv.nl/pub/intema/spam/AIPS_31DEC13A.tgz|here]]. It may run a bit slower than the Intel compiled version.
+A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[ftp://ftp.strw.leidenuniv.nl/pub/intema/spam/AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.
+Q: Why does the SPAM pipeline generate signal 11 errors in certain AIPS tasks?
+A: What is causing this is not completely clear, but probably has to do with the newer Intel hardware and Linux installs. A work-around seems to be to use the GNU-compiled version of AIPS 31DEC13 available [[ftp://ftp.strw.leidenuniv.nl/pub/intema/spam/AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.
+(Kindly tested by Gerrit Schellenberger and Arnab Chakraborty)
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+==== Problems running SPAM on new Intel CPUs, possibly after Linux update ====
+Q: Why doesn't the SPAM pipeline work (anymore), with AIPS generating NaNs in certain tasks?
+A: Updates of the Linux operating system in 2017 has triggered floating point problems when running AIPS tasks on a new line of Intel Xeon E5-xxx CPUs. This is likely caused by an outdated Intel compiler used to build the AIPS binary install. A GNU compiled version of AIPS 31DEC13 fixes the problem and is available [[ftp://ftp.strw.leidenuniv.nl/pub/intema/spam/AIPS_31DEC13_Gnu.tgz|here]]. It may run a bit slower than the Intel compiled version.
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+Feedback: [[huib.intema@curtin.edu.au|Click here]]