Differences

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

--- huibintemaspamfaq [2018/10/31 00:45] – huibintema
+++ huibintemaspamfaq [2019/06/18 04:45] – [Problems running SPAM on new Intel CPUs, possibly after Linux update] huibintema
@@ Line 2: / Line 2: @@
 ===== 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]].
+-----
+==== Obit is missing ====
+Q: Why is Obit reported to be missing during the ParselTongue install?
+A: The ParselTongue configuration command may give you the following error message:
+<code bash>
+checking for Obit... missing
+configure: error: Obit is not available
+</code>
+This is likely to be caused by a missing python package or system library, not because Obit is missing (the script looks for Obit.so in the ${SPAM_PATH}/Obit/python/ directory. To find what is causing the problem, please do the following:
+In bash:
+<code bash>
+. <spam_install_path>/setup.sh
+export PYTHONPATH=${SPAM_PATH}/Obit/python:${PYTHONPATH}
+export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${SPAM_PATH}/lib
+</code>
+Or in (t)csh:
+<code bash>
+source <spam_install_path>/setup.csh
+setenv PYTHONPATH ${SPAM_PATH}/Obit/python:${PYTHONPATH}
+setenv LD_LIBRARY_PATH ${LD_LIBRARY_PATH}:${SPAM_PATH}/lib
+</code>
+Then
+<code bash>
+${PYTHON}
+</code>
+And in python:
+<code python>
+import OSystem, OErr
+</code>
+Something will fail here, probably a missing python package or a missing library. Some of the missing libraries can be found [[ftp://ftp.strw.leidenuniv.nl/pub/intema/spam/lib/|here]]. Another possible command that may reveal missing libraries is through the following shell command:
+<code bash>
+ldd ${SPAM_PATH}/Obit/python/Obit.so
+</code>
+This will report all libraries that are needed by Obit. If one is missing, the line will contain the text "=> not found".
 -----
@@ Line 97: / Line 135: @@
 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.
 -----
@@ Line 138: / Line 176: @@
 -----
+Feedback: [[huib.intema@curtin.edu.au|Click here]]