```
ii chwala 0.5.13-1~kolab1 all Glorified WebDAV, done right
ii irony 0.4.7-1~kolab1 all Kolab Groupware DAV Access
ii kolab-autoconf 1.3.4-1 all Autodiscovery component for kolab
ii kolab-plesk 16.0.1-22 all Meta-package for Kolab on Plesk
ii kolab-syncroton 2.3.22-1~kolab1 all ActiveSync for Kolab Groupware
ii libkolab3 3.0.2-0~kolab1 amd64 Maps KDE containers to Kolab formats
ii libkolabxml1v5 1.3.0-0~kolab1 amd64 Libkolabxml is the reference implementation of the Kolab XML format
ii php-kolab 3.0.2-0~kolab1 amd64 PHP bindings for Kolab Library
ii php-kolabformat 1.3.0-0~kolab1 amd64 PHP bindings for Kolab Format 3.0 XML parsing
ii php-net-sieve 1.4.4-0~kolab2 all Handles talking to a sieve server
ii roundcubemail 1:1.5.3-0~kolab2 all skinnable AJAX based webmail solution for IMAP servers
ii swig4.0 4.1.0-0~kolab1 amd64 Generate scripting interfaces to C/C++ code
```
I'm getting a PHP Fatal Error when reading calendars in the kolab roundcube interface with the `kolabobject,kolabformat,kolabshared,kolabcalendaring` extensions
```
PHP Fatal error: Uncaught Error: Call to undefined method SWIG\_p_Kolab__cDateTime::isValid() in /usr/share/roundcubemail/plugins/libkolab/lib/kolab_format.php:279
```
I tried rebuilding all those extensions from source but I'm getting exactly the same issue
If I only leave `kolabformat` extension enabled then it's working fine and the class there is `cDateTime` instead of `SWIG\_p_Kolab__cDateTime`
It looks to me like the kolabcalendaring extension is replacing the kolabformat classes but the standard methods are not present
I'm really not qualified to understand the inner workings of kolab, swig etc, so if somebody can shed a light