You may fail to install Symphony .deb package due to broken dependencies found in synaptic manager,

You attempt to fix the broken dependency in synaptic, but getting error "subprocess pre-removal script returned error "
The following command seems not working either.
ubuntu@ubuntu-desktop:~$ sudo dpkg --force all -r symphony-nl1
(Reading database ... 112497 files and directories currently installed.)
Removing symphony-nl1 ...
/var/lib/dpkg/info/symphony-nl1.prerm: line 4: /opt/ibm/lotus/Symphony/symphony-nl1_uninstall.log: No such file or directory

To workaround this,
1.Quit Synaptic and navigate to the folder
/var/lib/dpkg/
2.Copy the file status to desktop,
3.Edit the status with Gedit or any text editor,
Search by the name of the package to be removed,
Remove the whole section if you found
4.Open a terminal session, copy the modified status back to original place.
ubuntu@ubuntu-desktop:~/Desktop$ sudo mv status /var/lib/dpkg/
5.Launch Synaptic
ubuntu@ubuntu-desktop:~/Desktop$ sudo synaptic

Link to The _khAttAm_ blog