I get this error while trying to install a package as follows:
sudo add-apt-repository ppa:v-launchpad-jochen-sprickerhof-de/pcl sudo apt-get update sudo apt-get install libpcl-all
The first two don't issue any error message, but the last one gives:
The following packages have unmet dependencies: libpcl-all : Depends: libpcl- 1.3-all but it is not going to be installed E: Unable to correct problems, you have held broken packages.
How is that even possible? If package xxx depends on package yyy, why isn't yyy installed then? Usually, when you run
apt-get install xxx it will automatically install all packages xxx depends on. What may prevent it from doing so?
but it is not going to be installed
well why isn't it?