Fit test of DiffSphereTest fails when tried on MantidPlot

[jmborr]

Resolution of this ticket is dependent on resolution of ticket http://trac.mantidproject.org/mantid/ticket/4394

Resolution of this ticket is dependent on resolution of ticket http://trac.mantidproject.org/mantid/ticket/5603

The fit test in DiffSphereTest test the convolution of a Gaussian resolution function with a DiffSphere function. The target parameters are:[[BR]]
''Gaussian c=0 h=3.0 sigma=0.62[[BR]]
DiffSphere I=2.9 Q=0.70 R=2.3 D=0.45''[[BR]]

The initial parameters are:[[BR]]
''Gaussian c=0 h=3.0 sigma=0.62[[BR]]
DiffSphere I=1.3 Q=0.70 R=1.4 D=1.5''[[BR]]
Fitting in MantidPlot produces the following error:[[BR]]
'''Error in execution of algorithm Fit:[[BR]]
GSLVector index is out of range'''[[BR]]

Starting with different initial parameters, very close to the target ones:[[BR]]
''Gaussian c=0 h=3.0 sigma=0.62[[BR]]
DiffSphere I=2.7 Q=0.70 R=2.5 D=0.46''[[BR]]
results in another error:[[BR]]
'''Error in execution of algorithm Fit:[[BR]]
Error in function boost::math::sph_bessel_j<e>(e,e): Got x = -29910.0084641663015645, but function requires x > 0.'''[[BR]]

[jmborr]

This issue was originally trac ticket 5597

[jmborr]

http://trac.mantidproject.org/mantid/raw-attachment/ticket/5597/DiffSphere1.dat
(uploaded by @mantid-roman on 2012-10-30T09:46:33)

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