Multiple files loading for SNS

[Andrei Savici]

I am trying to do something like

w=Load('ARCS30000-30002')

and I get

RuntimeError: Instrumentsearch object ARCS30000-
   at line 1 in '__main__'
   caused by line 85 in '/home/3y9/Mantid/Qt-build/bin/mantid/simpleapi.py'

[Roman Tolchenov]

#6082 should also fix this ticket.

[Martyn Gigg]

This still doesn't work. I didn't have ARCS files so instead I used the CNCS_7860_event.nxs from the systemtests Data directory and made 3 copies called CNCS_7861_event.nxs ,CNCS_7862_event.nxs ,CNCS_7863_event.nxs and tried

ws = Load('CNCS7860-7863')

and it produced

RuntimeError: Instrument search object CNCS7860-
  at line 1 in ''
  caused by line 85 in '/home/dmn58364/Builds/mantid/release/bin/mantid/simpleapi.py'

This is not considered high enough priority to be fixed for 2.3. Moved to 2.4

[Russell Taylor]

Another thing, that seems to be related to this because of the error message, is that if your default instrument is an SNS one and you give an incorrect run number to python Load, e.g. ws = Load('7866') then the error message that comes back does not tell you that it can't find the file:

ValueError: Invalid value for property Filename (list of str lists) "7862": Unable to parse runs: "Instrument search object CNCS_". 
  at line 1 in '__main__'
  caused by line 85 in '/home/tr9/Mantid/Code/debug/bin/mantid/simpleapi.py'

For an ISIS instrument it more helpfully says: "Unable to find file matching the string "HRP12345", even after appending suggested file extensions."

[Nick Draper]

Moved at the code freeze for release 2.4

[Nick Draper]

Moved to r2.6 at the end of r2.5

[Nick Draper]

Moved to the Backlog after the code freeze for R2.6

[Nick Draper]

moved to Release 3.0 as these all seem to be active

[Roman Tolchenov]

It seems the issue has been fixed. Tried the example from comment 4 and it worked although there were two output workspaces which is odd.

The error message for the example in comment 5 is the same for an SNS and an ISIS instruments and reads "Unable to find file ..."

[Russell Taylor]

Confirmed that there's no longer an error.

Does anyone know if there's a ticket already for the fact that multiple workspaces are created? (You actually end up with 3: the one you asked for, an identical one with a name like ARCS_30000_event_ARCS_30001_event_ARCS_30002_event and one called __@loadsum_temp@ which is presumably used to hold an individual file before summation and should be cleaned up.)

[Russell Taylor]

#8556 has been created regarding the multiple output workspaces issue.

[Stuart Campbell]

This ticket has been transferred to github issue ​6908