Item7454: Upgrade fails with error

Are you sure you want to re-install this module? [y/n] y
I will keep a backup of any files I overwrite.
Fetching the archive for TWiki::Plugins::TinyMCEPlugin.

...

Could not create pub/TWiki/TinyMCEPlugin/tinymce/jscripts/tiny_mce/plugins/inlinepopups/skins/clearlooks2.bak: Is a directory
Status: 500
Content-type: text/html

<h1>Software error:</h1>
<pre>Failed to move /tmp/7TYh7eIzBN/pub/TWiki/TinyMCEPlugin/tinymce/jscripts/tiny_mce/plugins/inlinepopups/skins/clearlooks2 to pub/TWiki/TinyMCEPlugin/tinymce/jscripts/tiny_mce/plugins/inlinepopups/skins/clearlooks2: Is a directory
</pre>

...

[Sun Mar  9 19:51:07 2014] TinyMCEPlugin_installer: Failed to move /tmp/7TYh7eIzBN/pub/TWiki/TinyMCEPlugin/tinymce/jscripts/tiny_mce/plugins/inlinepopups/skins/clearlooks2 to pub/TWiki/TinyMCEPlugin/tinymce/jscripts/tiny_mce/plugins/inlinepopups/skins/clearlooks2: Is a directory
 at /usr/local/lib/perl5/5.8.8/CGI/Carp.pm line 378.
   CGI::Carp::realdie('[Sun Mar  9 19:51:07 2014] TinyMCEPlugin_installer: Failed to...') called at /usr/local/lib/perl5/5.8.8/CGI/Carp.pm line 474
   CGI::Carp::die('Failed to move /tmp/7TYh7eIzBN/pub/TWiki/TinyMCEPlugin/tinymc...') called at tools/extender.pl line 840
   TWiki::Extender::_emplace('/tmp/7TYh7eIzBN') called at tools/extender.pl line 962
   TWiki::Extender::_install('ARRAY(0x2a6c3c8)', 'TinyMCEPlugin') called at tools/extender.pl line 1055
   TWiki::Extender::install('http://twiki.org/p/pub/Plugins', 'TinyMCEPlugin', 'TinyMCEPlugin', 'MANIFEST', 'data/TWiki/TinyMCEFrequentlyAskedQuestions.txt,0644,\x{a}data/TWi...', 'DEPENDENCIES', 'TWiki::Plugins::WysiwygPlugin,>=1,1,perl,Translator module\x{a}TW...') called at _Plugins/TinyMCEPlugin_installer line

-- TWiki:Main/VickiBrown - 2014-03-10

Failed to move is most likely a permission issue. Make sure all files and directories below the twiki root are owned by the webserver user.

-- TWiki:Main.PeterThoeny - 2014-03-10

Ownership and permissions match all other directories/plugins (which have no issues). The full error is

Failed to move /tmp/...clearlooks2 to pub/TWiki/TinyMCEPlugin...clearlooks2: Is a directory

-- TWiki:Main.VickiBrown - 2014-03-17

I just checked, the package has a /pub/TWiki/TinyMCEPlugin/tinymce/jscripts/tiny_mce/plugins/inlinepopups/skins/clearlooks2 directory with files and directory in it. So this seems to be an installer bug.

-- TWiki:Main.PeterThoeny - 2014-03-17

As a workaround, remove or rename the twiki/pub/TWiki/TinyMCEPlugin/tinymce/ directory before the upgrade.

-- TWiki:Main.PeterThoeny - 2014-03-17