Dot indexing error when adding chapter to report, no further help given

Hi all,

I am using the Report Generator toolbox and trying to add a chapter to the report object, but I get an error that I have no idea how to fix.

Here is a simplified version my code:

rpt = mlreportgen.report.Report(reportPath,formatStr);
ch = Chapter;
ch.Title = 'txt';
sec1 = Section('txt');
txt1 = 'txt';
add(sec1,txt1);
figures = thisFunctionMakesPlots(plotRelatedInputs);
figCaptions = {'cap','tion'};

for idxFig = 1:numel(figures)
    fig = Figure(figures(idxFig));
    fig.Snapshot.Caption = figCaptions{idxFig};
    fig.Snapshot.Height = '5in';
    add(sec1,fig);
end
add(ch,sec1);

sec2 = Section('txt');
txt2 = 'txt';
add(sec2,txt2);
[figures, figCaptions] = anotherFunctionThatMakesPlots(plotRelatedInputs);
for idxFig = 1:numel(figures)
    fig = Figure(figures(idxFig));
    fig.Snapshot.Caption = ['Text appended to ' figCaptions{idxFig}];
    fig.Snapshot.Height = '5in';
    add(sec2,fig);
end
add(ch,sec2);

add(rpt,ch);

The error message below is given after trying to run the last line.

Dot indexing is not supported for variables of this type.

Error in mlreportgen.report.Figure/createSnapshotFigure

Error in mlreportgen.report.Figure/getSnapshotImageImpl

Error in mlreportgen.report.Figure/getContent

Error in mlreportgen.report.ReportForm/fillHole

Error in mlreportgen.report.ReporterBase/processHole

Error in mlreportgen.report.ReportForm/fillForm

Error in mlreportgen.report.ReporterBase/getDocumentPart

Error in mlreportgen.report.ReporterBase/getImpl

Error in mlreportgen.report.internal.LockedForm.add

Error in mlreportgen.report.internal.LockedForm.add

Error in mlreportgen.report.ReportForm/fillHole

Error in mlreportgen.report.Section/processHole

Error in mlreportgen.report.ReportForm/fillForm

Error in mlreportgen.report.ReporterBase/getDocumentPart

Error in mlreportgen.report.ReporterBase/getImpl

Error in mlreportgen.report.Section/getImpl

Error in mlreportgen.report.internal.LockedForm.add

Error in mlreportgen.report.internal.LockedForm.add

Error in mlreportgen.report.ReportForm/fillHole

Error in mlreportgen.report.Section/processHole

Error in mlreportgen.report.Chapter/processHole

Error in mlreportgen.report.ReportForm/fillForm

Error in mlreportgen.report.ReporterBase/getDocumentPart

Error in mlreportgen.report.ReporterBase/getImpl

Error in mlreportgen.report.Section/getImpl

Error in mlreportgen.report.internal.LockedForm.add

Error in mlreportgen.report.ReportBase/add

It is quite useless, as I am not able to click into any of the levels to try and understand the problem better, so I have no idea how to fix this. Please help! Thanks in advance.

[Guillaume]

If you issue

dbstop if caught error

at the command line and try again, where does it break into the debugger?

Possibly, you have a callback which throws the dot indexing error and said error is trapped by the report generator.

Note: once you're done with the debugging, issue

dbclear if caught error

to go back to a normal debugging state.

[K W]

Great tip with the 'if caught error' line!

It stopped with the following message:

Caught-error breakpoint was hit in graphics\private\setGraphicsProperty at line 0. The error was:

Error using matlab.graphics.axis.Axes/set

There is no XColorMode_I property on the Axes class.

It did not break into the debugger at any lower level with the green debug arrow, it still only shows the white debug arrow at

add(rpt,ch);

.

What does this Axes error mean, and how could I fix it?

[Guillaume]

The root cause of the error is that some function tries to access the XColorMode_I property of an axis, but there is no such property. The question is whether it's a matlab function or one of yours that's responsible.

What is the call stack when the error is caught? Use dbstack to find out.

Note that there are plenty of ****_I hidden axis properties such as XColor_I for internal use by matlab but indeed, at least on R2019a, there is no XcolorMode_I.