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

[Wayne Oldford]

I don't know what has changed with Catalina

But I just tried my tk console from the shell command tkcon 
And got the following error. 
Here is my shell:

$ tkcon 

  dyld: Library not loaded: /usr/local/lib:/opt/X11/lib/libtk8.6.dylib
      Referenced from: /usr/local/bin/wish
      Reason: image not found
    Abort trap: 6


I don't know whether this is a red herring or not, but the 
Console fails to boot.

John does it work for you?

Not sure whether Python has the same trouble.  Kind of old info at https://www.python.org/download/mac/tcltk/ 




-----Original Message-----
From: "Fox, John" <jfox using mcmaster.ca>
Date: Thursday, June 11, 2020 at 7:54 PM
To: Wayne Oldford <rwoldford using uwaterloo.ca>
Cc: Peter Dalgaard <pdalgd using gmail.com>, "r-devel using r-project.org" <r-devel using r-project.org>
Subject: Re: [Rd]  tcltk image reading problem (on a mac?): [tcl] encountered an unsupported criticial chunk type "eXIf"

    Dear Wayne and Peter,
    
    FWIW, I observe exactly the same problem in Catalina. The error and my session info:
    
    -------- snip --------
    
    > tkimage.create("photo", file = fname)
    Error in structure(.External(.C_dotTclObjv, objv), class = "tclObj") : 
      [tcl] encountered an unsupported criticial chunk type "eXIf".
    
    > sessionInfo()
    R version 4.0.0 (2020-04-24)
    Platform: x86_64-apple-darwin17.0 (64-bit)
    Running under: macOS Catalina 10.15.5
    
    Matrix products: default
    BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
    LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib
    
    locale:
    [1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8
    
    attached base packages:
    [1] tcltk     stats     graphics  grDevices utils     datasets  methods   base     
    
    loaded via a namespace (and not attached):
    [1] compiler_4.0.0 tools_4.0.0   
    
    -------- snip --------
    
    This is from RStudio but I see the same thing in the R.app.
    
    I hope this is of some help,
     John
    
     -----------------------------
      John Fox, Professor Emeritus
      McMaster University
      Hamilton, Ontario, Canada
      Web: http::/socserv.mcmaster.ca/jfox
    
    > On Jun 11, 2020, at 6:43 PM, Wayne Oldford <rwoldford using uwaterloo.ca> wrote:
    > 
    > Yes.
    > I seem to be picking up
    > <Tcl>  8.6
    > I should have noted that.
    > 
    > Use to work for me too in Mojave.
    > I have the sneaky feeling that Catalina is the problem.
    > 
    > R. W. Oldford
    > 
    > https://math.uwaterloo.ca/~rwoldfor
    > 
    > ________________________________
    > From: Peter Dalgaard <pdalgd using gmail.com>
    > Sent: Thursday, June 11, 2020 5:56:15 PM
    > To: Wayne Oldford <rwoldford using uwaterloo.ca>
    > Cc: r-devel using r-project.org <r-devel using r-project.org>
    > Subject: Re: [Rd] tcltk image reading problem (on a mac?): [tcl] encountered an unsupported criticial chunk type "eXIf"
    > 
    > 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
    >> 
    >> ___________________________________________________
    >> 
    >> 
    >>       [[alternative HTML version deleted]]
    >> 
    >> ______________________________________________
    >> R-devel using r-project.org mailing list
    >> https://stat.ethz.ch/mailman/listinfo/r-devel
    > 
    > --
    > 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
    > 
    > 
    > 
    > 
    > 
    > 
    > 
    > 
    > 
    > 
    > 	[[alternative HTML version deleted]]
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