#13350 (Bug) Jeti 1501 intermittently produces nan results during ‘Create Colorimieter correction’

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Component: DisplayCAL 3.6.2
Created by dcb709

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Context:

I am using ArgyllCMS 2.0.1 with DisplayCAL 3.6.2 on Mac OS 10.11.6

I have a Spectraval Jeti 1501 Spectroradiometer and an Xrite i1 Colorimeter

The issue:

I would like to create a colorimeter correction matrix for the i1 using the sepctraval.  When I complete the process about 9 times out of 10 I get the error “ ccxxmake: Error – CGATS file ‘reference.ti3’ read error: Error in the field ‘reference.ti3: Field ‘XYZ_X’ has unexpected type should be ‘real’, is ‘non-quoted char string’“,  and no corrective matrix is saved.

I have found the .ti3 files that are created during this process, and upon investigation into the reference .ti3 created by the Jeti 1501 I find that during successful attempts the file contains number sets each of 10 significant digits.  When I look in the unsuccessful attempts the file contains number sets which contain a few entries of 4 significant digits, followed by many “nan” entries.

I did notice in the ArgyllCMS Changes list that in V1.4.0 a bug in spectro/ild3.c was repaired which had resulted in NAN.  I wonder if the issue I’m experiencing is in some way similar.

A further piece to the puzzle:

I have used my Jeti 1501 to run a complete calibration of a monitor (for this calibration I didn’t use the i1 at all).  On first calibration all worked fine.  Then I did another calibration on the same monitor with exactly the same settings and at the end of the calibration attempt I encountered the message “ValueError: Cannot convert float NaN to integer”.    Due to the reference to nan I suspect this is the same issue.

Request:

I notice that when I run DisplayCAL on a PC with Jeti and i1 all works fine consistently.  I’m thinking this is a bug on the Mac combination.

Attachments:

Log file (turned on ArgyllCMS debugging output, then attempted ‘Create Colorimeter Correction’, then created a compressed log archive.  Have also attached examples of .it3 file both with and without the error.


DisplayCAL logs - Jeti 1501 issue (application/zip | 2018-08-30 02:28:13)


3 comments on “Jeti 1501 intermittently produces nan results during ‘Create Colorimieter correction’”

  1. Hi,

    the debug log won’t help sorry. I see you already contacted Graeme via the ArgyllCMS mailing list. Have you followed his suggestion and ran spotread on the command line to try and figure out if there is/are a certain color(s) that could be triggering the problem? Note that this is likely happening in the instrument driver, so there’s not much help I can provide as the issue would probably have to be dealt with in ArgyllCMS.

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