Loading NeXuS files with some "string" log entries

[Nick Draper]

The Muon NeXuS files contain a few log values whose values are strings - some are ones generated internally in SECI and some set up by instrument scientists. The newest SECI now also uses strings for logging "enumerated" values from the sample environment control VIs instead of small integers 0 to n.

I'm trying to looking at the (numeric) log tables by doing: in the Workspace window, Load - File select a NeXuS file. Click "Run". It loads, but with some warnings:

"In LoadMuonLog: hifi/data/hifi00015473.nxs skipping non-numeric log data"

I then right-click on the workspace that appears in the list and do "Sample logs...". The list that appears is incomplete, missing about the same number of log values as there are string logs, but the missing ones are the last in alphabetical order (or perhaps the last in the HDF file structure).

Now selecting one and doing "Import log" returns the wrong log data if it's "after" one or more of the strings ones. It's as if Mantid is making a list of log names, then separately making a list of log data tables leaving out the string ones, truncating the log name list to the same length and then matching them up again.

I've looked at MuSR (old SECI) and HiFi (old and new SECI) files so far, also loading into the workspace via the Muon Analysis window, and it seems to be consistent.

James Lord.

Full Mantid "results log":

Algorithm: Load v1
Parameters:
  Name: Filename, Value: //hifi/data/hifi00015473.nxs, Default?: No, Direction: Input
  Name: OutputWorkspace, Value: hifi00015473, Default?: No, Direction: Output
  Name: LoaderName, Value: LoadMuonNexus, Default?: No, Direction: Output
  Name: SpectrumMin, Value: 0, Default?: Yes, Direction: Input
  Name: SpectrumMax, Value: 2147483647, Default?: Yes, Direction: Input
  Name: SpectrumList, Value: , Default?: Yes, Direction: Input
  Name: AutoGroup, Value: 0, Default?: Yes, Direction: Input
  Name: EntryNumber, Value: 0, Default?: Yes, Direction: Input
  Name: MainFieldDirection, Value: Transverse, Default?: Yes, Direction: Output
  Name: TimeZero, Value: 0, Default?: Yes, Direction: Output
  Name: FirstGoodData, Value: 0, Default?: Yes, Direction: Output
Using LoadMuonNexus version 2.
Loading geometry cache from C:\MantidInstall\instrument\HIFI_Definition.vtp
Invalid argument to LoadParameter sub-algorithm
Invalid value for property Filename (string) "C:/MantidInstall/instrument//HIFI_Parameters.xml": File "HIFI_Parameters.xml" not found
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
In LoadMuonLog: //hifi/data/hifi00015473.nxs skipping non-numeric log data
Load successful, Duration 2.31 seconds

[Roman Tolchenov]

(In [9657]) Reading string logs from muon nexus files. re #2534

[Michael Whitty]

tested in 11101

[Stuart Campbell]

This ticket has been transferred to github issue ​3381