SANS accept already loaded workspace as input

[mantid-builder]

Original Reporter: Gesner Passos

This ticket is blocks : TRAC6530

The current version of SANS reduction does not accept passing an already loaded workspace as input for the Sample Data, Can, etc.

This option was done in order to make sure that we do not try to 'move the same workspace to its center twice'. Because the movement are relative, this would cause the reduction to work on a fake center and produce a wrong answer.

But, it does have some drawbacks. Sometimes we load data twice to perform a single reduction (wasting time and resources). But, in order to work with the Event Mode data, if we have to split the data, this would mean loading data many times, which would not work nice.

So, my suggestion is to accept workspace as input, but raising exception if the workspace has been moved or rotated so far.

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Keywords: SANS

[mantid-builder]

This issue was originally trac ticket 7221