Calculate Flat background removes backgound from monitors.

[abuts]

This ticket is blocks : TRAC9135

This should never happens.

The script below provides workspace 2 match either when calculateFlatBackground is disabled or when one explicitly provides the list of the spectra, which excludes monitors. This actually means that it removes background from monitors which is useless operation and dangerous operation. Instrument scientists were complaining to me about strange behaviour of the background removal, but I did not understood the reason behind this.

Should be fixed.

######################################################################
#Python Script Generated by GeneratePythonScript Algorithm
######################################################################
Load(Filename=r'd:\Data\MantidSystemTests\Data\MAR11001.raw',OutputWorkspace='MAR11001.raw')
LoadDetectorInfo(Workspace='MAR11001.raw',DataFilename=r'd:\Data\MantidSystemTests\Data\MAR11060.raw',RelocateDets='1')

GetEi(InputWorkspace='MAR11001.raw',Monitor1Spec='2',Monitor2Spec='3',EnergyEstimate='12')
ScaleX(InputWorkspace='MAR11001.raw',OutputWorkspace='11001.spe',Factor='-6536.707778516824',Operation='Add',InstrumentParameter='DelayTime',Combine='1')
MoveInstrumentComponent(Workspace='11001.spe',ComponentName='Moderator',Z='-1.4419999999999999',RelativePosition='0')

ConvertToDistribution(Workspace='11001.spe')
spectra=range(3,921);
CalculateFlatBackground(InputWorkspace='11001.spe',OutputWorkspace='11001.spe',WorkspaceIndexList=spectra,StartX='11463.292221483176',EndX='12963.292221483176',Mode='Mean')
ConvertFromDistribution(Workspace='11001.spe')
#
CropWorkspace(InputWorkspace='11001.spe',OutputWorkspace='11001_OldCFine.spe',StartWorkspaceIndex='3',EndWorkspaceIndex='921')
#
NormaliseToMonitor(InputWorkspace='11001.spe',OutputWorkspace='11001.spe',MonitorSpectrum='1',IntegrationRangeMin='-5536.7077785199999',IntegrationRangeMax='-4536.7077785199999',IncludePartialBins='1')
CropWorkspace(InputWorkspace='11001.spe',OutputWorkspace='11001_step1aOldC.spe',StartWorkspaceIndex='3',EndWorkspaceIndex='921')
############################################################################################################

######################################################################
#Python Script Generated by GeneratePythonScript Algorithm
######################################################################
Load(Filename=r'd:\Data\MantidSystemTests\Data\MAR11001.raw',OutputWorkspace='MAR11001.raw',LoadMonitors='Separate')
LoadDetectorInfo(Workspace='MAR11001.raw',DataFilename=r'd:\Data\MantidSystemTests\Data\MAR11060.raw',RelocateDets='1')

GetEi(InputWorkspace='MAR11001.raw_Monitors',Monitor1Spec='2',Monitor2Spec='3',EnergyEstimate='12')
AddSampleLog(Workspace='MAR11001.raw',LogName='Ei',LogText='12.9728953307',LogType='Number')
ScaleX(InputWorkspace='MAR11001.raw_Monitors',OutputWorkspace='11001.spe_monitors',Factor='-6536.707778516824',Operation='Add',InstrumentParameter='DelayTime',Combine='1')
ScaleX(InputWorkspace='MAR11001.raw',OutputWorkspace='11001.spe',Factor='-6536.707778516824',Operation='Add',InstrumentParameter='DelayTime',Combine='1')
MoveInstrumentComponent(Workspace='11001.spe',ComponentName='Moderator',Z='-1.4419999999999999',RelativePosition='0')
#
ConvertToDistribution(Workspace='11001.spe')
CalculateFlatBackground(InputWorkspace='11001.spe',OutputWorkspace='11001.spe',StartX='11463.292221483176',EndX='12963.292221483176',Mode='Mean')
ConvertFromDistribution(Workspace='11001.spe')
#
CloneWorkspace(InputWorkspace='11001.spe',OutputWorkspace='11001NewFine')

rez=CheckWorkspacesMatch('11001NewFine','11001_OldCFine.spe');
print ' Match1=',rez

# Causes difference:
NormaliseToMonitor(InputWorkspace='11001.spe',OutputWorkspace='11001.spe',MonitorWorkspace='11001.spe_monitors',IntegrationRangeMin='-5536.7077785199999',IntegrationRangeMax='-4536.7077785199999',IncludePartialBins='1')
#AddSampleLog(Workspace='11001.spe',LogName='DirectInelasticReductionNormalisedBy',LogText='monitor-1')


rez=CheckWorkspacesMatch('11001_step1aOldC.spe','11001.spe');
print ' Match2=',rez

[abuts]

This issue was originally trac ticket 9312