[LSST|dm-users 619] Re: Error when Running Chris Walter's: Introduction to the DM AFW packages ipython notebook

[Will Dawson]

Dominique,

Thank you for translating the error. The problem then seems to be with an inconsistent DM functions default parameter settings. From the notebook the schema and measurement configuration is set by

schema = lsst.afw.table.SourceTable.makeMinimalSchema()
measureSourcesConfig  = lsst.meas.algorithms.SourceMeasurementConfig()

So it appears that makeMinimialSchema() and SourceMeasurementConfig() need to be made compatible (perhaps is has been in v10_1). Should I be using v10_1 instead of v10_0?

Thank you for the very helpful CFHTLS references.

Regards,
Will

> On May 7, 2015, at 12:09 PM, Dominique Boutigny <boutigny at in2p3.fr> wrote:
> 
> Hi Will,
> 
> Yes, the schema has changed in the latest stack versions and "flux.sinc_flux" is not any more in the source table schema. Something directly replacing sinc_flux was present  in the v10_0 but this has been completely replaced in the latest stack_v10_1. There are now 10 Aperture flux corresponding to 10 different radii. 
> 
> You can have a look to http://nbviewer.ipython.org/github/DarkEnergyScienceCollaboration/CFHTLS-Reprocess/tree/master/notebooks/ <http://nbviewer.ipython.org/github/DarkEnergyScienceCollaboration/CFHTLS-Reprocess/tree/master/notebooks/> to get notebook examples with the most recent stack.
> 
> I can have a look to Chris' notebooks if you wish.
> 
> Best,
> 
> Dominique
> 
> On 05/07/2015 11:52 AM, Will Dawson wrote:
>> I encountered an error when running Chris Walter’s Introduction to the DM AFW packages <http://nbviewer.ipython.org/github/DarkEnergyScienceCollaboration/DataManagementWorkbook/blob/master/Basic%20DM%20AFW%20Introduction.ipynb> ipython notebook. In the second to last step when I run the command:
>> 
>> # Apply the measurement routines to the exposure using the sources as input
>> measure.run(exposure, sources)
>> 
>> I get the following error:
>> 
>> ---------------------------------------------------------------------------
>> NotFoundError                             Traceback (most recent call last)
>> <ipython-input-19-77c6eca8bda0> in <module>()
>>      16 
>>      17 # Apply the measurement routines to the exposure using the sources as input
>> ---> 18 measure.run(exposure, sources)
>>      19 
>>      20 # Now let's look at the output from some of the measurment algorithms.
>> 
>> /Users/dawson/lsst/DarwinX86/pipe_base/10.0+2/python/lsst/pipe/base/timer.pyc in wrapper(self, *args, **keyArgs)
>>     116         logInfo(obj = self, prefix = func.__name__ + "Start")
>>     117         try:
>> --> 118             res = func(self, *args, **keyArgs)
>>     119         finally:
>>     120             logInfo(obj = self, prefix = func.__name__ + "End")
>> 
>> /Users/dawson/lsst/DarwinX86/meas_algorithms/10.0+2/python/lsst/meas/algorithms/measurement.pyc in measure(self, exposure, sources, noiseImage, noiseMeanVar, references, refWcs)
>>     422 
>>     423         self.log.info("Measuring %d sources" % len(sources))
>> --> 424         self.config.slots.setupTable(sources.table, prefix=self.config.prefix)
>>     425 
>>     426         self.preMeasureHook(exposure, sources)
>> 
>> /Users/dawson/lsst/DarwinX86/meas_algorithms/10.0+2/python/lsst/meas/algorithms/measurement.pyc in setupTable(self, table, prefix)
>>      57         if self.centroid is not None: table.defineCentroid(prefix + self.centroid)
>>      58         if self.shape is not None: table.defineShape(prefix + self.shape)
>> ---> 59         if self.apFlux is not None: table.defineApFlux(prefix + self.apFlux)
>>      60         if self.modelFlux is not None: table.defineModelFlux(prefix + self.modelFlux)
>>      61         if self.psfFlux is not None: table.definePsfFlux(prefix + self.psfFlux)
>> 
>> /Users/dawson/lsst/DarwinX86/afw/10.0+3/python/lsst/afw/table/tableLib.pyc in defineApFlux(self, *args)
>>    9869     def defineApFlux(self, *args):
>>    9870         """defineApFlux(SourceTable self, std::string const & name)"""
>> -> 9871         return _tableLib.SourceTable_defineApFlux(self, *args)
>>    9872 
>>    9873     def getApFluxDefinition(self):
>> 
>> NotFoundError: 
>>   File "src/table/Schema.cc <http://schema.cc/>", line 239, in SchemaItem<T> lsst::afw::table::detail::SchemaImpl::find(const std::string &) const [T = double]
>>     Field or subfield withname 'flux.sinc_flux' not found with type 'D'. {0}
>> lsst::pex::exceptions::NotFoundError: 'Field or subfield withname 'flux.sinc_flux' not found with type 'D'.'
>> 
>> Perhaps this is related to the fact that the notebook was written in 2013 and I am using v10.0 of the stack. As I am new to the stack, and given the surprisingly complex error message for such a seemingly simple command, I am hoping that the experts can shed some light on the matter.
>> 
>> Thanks,
>> Will Dawson
>> 
>> 
>> 
>> 
>> 
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> -- 
> Dominique Boutigny  -  CNRS / CC-IN2P3
> Now at SLAC National Accelerator Laboratory
> 
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