Reflectometry 3.1.1 issue to investigate - Possible defect

[OwenArnold]

See below. This is probably due to changes made to Stitch1D. I'm confident that changes made to Stitch1D and Stitch1DMany were for the better, but it could be due to auxiliary workspaces not sitting around in the ADS. Needs investigation in any case.

Hi Owen,

3.1.1 seems to have broken a previously working script on the line

DataOut=CloneWorkspace(GroupWorkspaces([nIp, nIa]))

The error dump is included below.  

This is part of the polarization corrections that I coded to test ReflectometryReductionOneAuto and may be obsolete by now.  Do you have a replacement/ workaround/ fix? 

Many thanks,  
Tim

------------------------------------------------------------------------ - - - 
RuntimeError                              Traceback (most recent call last)
`<ipython-input-2-f611aa3039dc>` in `<module>`()
      4 
      5 from mantid.simpleapi import *
----> 6 from WrappedReduction import *

u:\user\mantid\TestingPointDetectorReduction\WrappedReduction.py in `<module>`()
    353 
    354 #####################        M2-0167 T=5K
--> 355 ( _ ,r1q , _)= ref('8169+8171+8173+8175+8177+8179+8181',theta=0.4)
    356 
    357 print r1q

u:\user\mantid\TestingPointDetectorReduction\WrappedReduction.py in ref(RunNumbers, theta)
    325         trans=CorrectMonitor(trans)
    326         (_,rl,ThetaOut)=ReflectometryReductionOneAuto(InputWorkspace=dd,I0MonitorIndex='2',ProcessingInstructions='3',ThetaIn=theta,FirstTransmissionRun=trans,StrictSpectrumChecking=False)
--> 327         RcorrectedVsLambda = CorrectPolarization(rl)
    328         RcorrectedVsQz = RcorrectedVsLambda.convertUnits('MomentumTransfer')
    329         return RcorrectedVsQz, RcorrectedVsLambda, ThetaOut

u:\user\mantid\TestingPointDetectorReduction\WrappedReduction.py in CorrectPolarization(TheDataIn)
    281                 nIa = ( Ip * (rho * Pp - 1.0) + Ia * (Pp + 1.0) ) / D
    282                 #print "nIp,nIa ",nIp, nIa
--> 283                 DataOut=CloneWorkspace(GroupWorkspaces([nIp, nIa]))
    284                 return DataOut
    285 

C:\MantidInstall\bin\mantid\simpleapi.pyc in algorithm_wrapper(*InputWorkspaces, **Version=1)
    565 
    566         _set_properties(algm, *args, **final_keywords)
--> 567         algm.execute()
    568         return _gather_returns(algorithm, lhs, algm)
    569 

RuntimeError: Some invalid Properties found

[OwenArnold]

This issue was originally trac ticket 9109