I get the same message but looking more on packages.ubuntu.com. One thing is the package gnumeric doc which has yelp as depency is listed as a recomend but not installed in lubuntu by defualt. I am seeing after a new install in lubuntu and to install gnumeric. Also to install gnumeric-doc will take 48 more megabytes of space which would increase the size of the iso which for lubuntu is intended to fit on a cd so needs to be under 700 mb. I could get yelp to launch with sudo apt-get install gnumeric-doc.
I get the same message but looking more on packages. ubuntu. com. One thing is the package gnumeric doc which has yelp as depency is listed as a recomend but not installed in lubuntu by defualt. I am seeing after a new install in lubuntu and to install gnumeric. Also to install gnumeric-doc will take 48 more megabytes of space which would increase the size of the iso which for lubuntu is intended to fit on a cd so needs to be under 700 mb. I could get yelp to launch with sudo apt-get install gnumeric-doc.