Stitch1DMany crash report

[Owen Arnold]

According to Tim, running this twice causes Mantid to hang. Could you please try to trackdown the origin of the problem and either fix it or pass the ticket back to Owen.

This affects the 3.3 release and the nightly builds according to TIm, so we should fix it ASAP.

import os, sys
sys.path.append(r'C:\MantidInstall')
sys.path.append(r'C:\MantidInstall\bin')
sys.path.append(r'u:\user\mantid\TestingPointDetectorReduction')
from mantid.simpleapi import *
from WrappedReduction import *
r=Runs()

## Build a transmission
trans = transmission('11711+11712+11713+11683+11633+11634+11635')
## Get the data
r1q = refq('11716+11723', theta=0.50, Transmission = trans)
r2q = refq('11718+11717+11724', theta=1.0, Transmission = trans)
r3q = refq(r[11719:11722,11725:11727], theta=2.0, Transmission = trans)

##  Rebin
rr1q = Rebin(r1q,'0.010,-0.01,0.05')
rr2q = Rebin(r2q,'0.018,-0.01,0.1')
rr3q = Rebin(r3q,'0.03,-0.01,0.25')

##  Stitch
rr,scale = Stitch1DMany('rr1q,rr2q,rr3q', Params='-0.015’)
print "Happy”
rr_2,scale_2 = Stitch1DMany('rr1q,rr2q,rr3q', Params='-0.015')
print "Happy”
rr,scale = Stitch1DMany('rr1q,rr2q,rr3q', Params='-0.015')
print “UnHappy. Execution gets stuck on the line above.”

[Harry Jeffery]

This script also reproduces the issue. Currently investigating.

CreateSampleWorkspace(OutputWorkspace='r1a', Function='Flat background', NumBanks=5, BankPixelWidth=1, NumEvents=0, XUnit='Time', BinWidth=100)
CreateSampleWorkspace(OutputWorkspace='r2a', Function='Flat background', NumBanks=5, BankPixelWidth=1, NumEvents=0, XUnit='Time', BinWidth=100)
CreateSampleWorkspace(OutputWorkspace='r3a', Function='Flat background', NumBanks=5, BankPixelWidth=1, NumEvents=0, XUnit='Time', BinWidth=100)

CreateSampleWorkspace(OutputWorkspace='r1b', Function='Flat background', NumBanks=5, BankPixelWidth=1, NumEvents=0, XUnit='Time', BinWidth=100)
CreateSampleWorkspace(OutputWorkspace='r2b', Function='Flat background', NumBanks=5, BankPixelWidth=1, NumEvents=0, XUnit='Time', BinWidth=100)
CreateSampleWorkspace(OutputWorkspace='r3b', Function='Flat background', NumBanks=5, BankPixelWidth=1, NumEvents=0, XUnit='Time', BinWidth=100)

GroupWorkspaces(InputWorkspaces='r1a,r1b', OutputWorkspace='r1g')
GroupWorkspaces(InputWorkspaces='r2a,r2b', OutputWorkspace='r2g')
GroupWorkspaces(InputWorkspaces='r3a,r3b', OutputWorkspace='r3g')

rr,scale = Stitch1DMany('r1g,r2g,r3g', Params='0.1')
rr_2,scale_2 = Stitch1DMany('r1g,r2g,r3g', Params='0.1')
rr,scale = Stitch1DMany('r1g,r2g,r3g', Params='0.1')

[Harry Jeffery]

Refs #11390 Fix hang in Stitch1DMany

Changeset: 247e78db3a64fad1fd729358ff6a3a2d8d62aefc

[Harry Jeffery]

This is being verified as ​pull request #430.

[Owen Arnold]

Merge pull request #430 from mantidproject/11390_fix_hang_in_stitch1dmany

Fix hang in Stitch1DMany

Full changeset: ​684c5644aebf062bf126d7309bc9a198eb138341

[Stuart Campbell]

This ticket has been transferred to github issue ​12229