[Rd] tcltk image reading problem (on a mac?): [tcl] encountered an unsupported criticial chunk type "eXIf"

[Peter Dalgaard]

Happy enough for me on Mojave. 

On the off chance that you are picking up an old Tcl, do you see this?

> tcl("info","tclversion")
<Tcl> 8.6 


-pd

> On 11 Jun 2020, at 23:04 , Wayne Oldford <rwoldford using uwaterloo.ca> wrote:
> 
> Hello everyone
> 
> I am not sure when this appeared
> (sometime post R 3.5.0 and after I switched to Mac OS Catalina).
> 
> I do not think it happens on all platforms (e.g. seems to work on windows).
> 
> But it seems that
> 
>      tkimage.create()
> 
> no longer works on a Mac for all png files.
> 
> 
> (It does work for *some* old png files I have on disk but I have not been able to determine what is different about the ones that work)
> 
> Any help would be appreciated.
> 
> - Wayne
> 
> 
> R.W. Oldford
> math.uwaterloo.ca/~rwoldfor
> 
> 
> 
> 
>> library(tcltk)
> 
>> fname <- "Rplot.png"
>> png(filename = fname, width = 500, height = 500)
>> hist(rnorm(20))
>> dev.off()
> 
>> tkimage.create("photo", file = fname)
> 
> Error in structure(.External(.C_dotTclObjv, objv), class = "tclObj") :
>  [tcl] encountered an unsupported criticial chunk type "eXIf".
> 
> 
> ______________________________
> 
>> R.version
>               _
> platform       x86_64-apple-darwin17.0
> arch           x86_64
> os             darwin17.0
> system         x86_64, darwin17.0
> status
> major          4
> minor          0.0
> year           2020
> month          04
> day            24
> svn rev        78286
> language       R
> version.string R version 4.0.0 (2020-04-24)
> nickname       Arbor Day
> 
> ___________________________
> 
> macOS Catalina V 10.15.5
> 
> ___________________________________________________
> 
> 
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> 
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-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd.mes using cbs.dk  Priv: PDalgd using gmail.com