Hi all. Managed to find the evil :) The statement "import gobject" (not required now), was the culprit. <div class="gmail_quote">On Tue, Oct 9, 2012 at 8:56 PM, Ajay Garg <<a href="mailto:ajay@activitycentral.com" target="_blank">ajay@activitycentral.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all. While porting the multi-select patch to sugar-0.97.6, I get the following error in "~/.sugar/default/logs/shell.log". Unfortunately, there is no stacktrace; so it is impossible to find out the source of error (unless of course, I add only 1 line at a time, which - to be frank - is not possible). Following are the last of the log-statements :: ############################################################################################################## Usage: metacity-message (restart|reload-theme|enable-keybindings|disable-keybindings|toggle-verbose) 1349796121.070065 WARNING root: Can not disable metacity mouse button modifiers 1349796121.071393 DEBUG root: STARTUP: Loading the bundle registry TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases ** ERROR:/home/ajay/sugar-build/source/pygobject/gi/_gobject/pygobject.c:946:pygobject_new_full: assertion failed: (tp != NULL) ############################################################################################################## Anyway that the stacktrace may be obtained? Regards, Ajay Garg Dextrose Developer Activity Central: <a href="http://activitycentral.com/" style="font-size:13px;font-family:arial,sans-serif" target="_blank">http://activitycentral.com</a> </blockquote></div> Regards, Ajay Garg Dextrose Developer Activity Central: <a href="http://activitycentral.com/" style="font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)" target="_blank">http://activitycentral.com</a>