Stop the Reduction if Mask File Not Found

[Peter Parker]

Richard has pointed out that simply printing a warning when the ISIS SANS reduction cannot find the specified mask file is not enough -- the red text is lost in a sea of other log messages.

He would like the reduction to complete stop, instead.

[Peter Parker]

Refs #9481 - Stop reduction on missing mask file.

Changeset: c4c6edd2a879ac9a8dda75ab9d9727d8288a98b2

[Peter Parker]

To test (ISIS only):

• The \\olympic\babylon5\Public\PGP\Test Data\9481 folder contains the files needed to test this ticket. Add it to Mantid's Managed Directory list.

• Open up the ISIS SANS interface and select the "SANS2D" instrument.

• Load the "MaskSANS2DReductionGUI_MissingMaskFiles.txt" User File. This contains a reference to a non-existent mask file.

• Type "22048" in the Scattering Sample field and then click "Load Data".

• Click "1D Reduce". The reduction should stop with an error message, making it clear that the mask file could not be found.

• Do the same but with "MaskSANS2DReductionGUI_MaskFiles.txt" to see the reduction go through without any problems.

[Jay Rainey]

Merge remote-tracking branch 'origin/feature/9481_stop_reduction_if_mask_file_not_found'

Full changeset: ​9faa5b72d169abbb4a401b071add70a59e274c25

[Jay Rainey]

An error message is now thrown and is no longer lost in the sea of log messages. Code change was sensible.

[Stuart Campbell]

This ticket has been transferred to github issue ​10324