Can't find package xml while executing. Xubuntu 16.04

Question

astroboy@MyUbuntu:~$ ds9 &

[1] 365

astroboy@MyUbuntu:~$ Error in startup script: can't find package xml

    while executing

"package require xml"

    ("x11" arm line 9)

    invoked from within

"switch $ds9(wm) {

    x11 {

    # set to absolute path so that if -cd command is used,

    # so we can still find our files
    set ds9(root) [file normalize [..."
    (file "/usr/share/saods9/library/ds9.tcl" line 197)

Need to use it for iraf but it doesn't work. Please, suggest how to solve. Thanks in advance.

Answer 1

This is a bug in Ubuntu 16.04. Just do a

$ sudo apt-get install tclxml

in a terminal window. Or upgrade to Ubuntu 18.04, which also gives you an IRAF package.

Answer 2

ds9 should be an executable.

First try to check if it is executable with the following command:

$ ldd `which ds9`

If the answer is:

not a dynamic executable

Then, you must download from the official site ds9 ( http://ds9.si.edu/site/Download.html ) and install it. Firsr, untar the downloaded file

$ sudo tar xzvf ds9.linux_distribution.tar.gz

Move

$ sudo mv ds9 /usr/local/bin

change permissions

$ sudo chmod +x /usr/local/bin/ds9

And, finally run:

$ ds9

Answer 3

This appears to be duplicated with other post. Since I'm not allowed to comment, I replying with this answer.

Install the official Ubuntu ds9 (sudo apt-get update && sudo apt-get install saods9).

If you are using Conda/Anaconda environment, I found your error with both Anaconda2-2019.10 and Anaconda3-2020.02. To solve it, downgrade the default ds9 v8.0 to v7.4 with the command conda install ds9"<8" or conda install ds9"=7.4". That worked for me (Ubuntu 16.04 and 18.04 LTS).