According to may information this is the rare issue occurred with Avast antivirus. If you want avoid this error, for that you first need to uninstall your Avast antivirus. Then restart your computer system, and then reinstall avast antivirus over it. I suggest you to try out this solution, and let me know if you are able to solve this issue or not.
Nope. reinstalling avast has an sideeffect - VPS will return back to the version which is bundled with the installer - which is still under the limit (and that's why it works seemingly again). so it's no solution at all. raise the limit.
This description does not reflect what happened to my fresh Ubuntu 10.04 (in a VirtualBox running in a Mac). I installed avast, and it worked well, initially. Unfortunately, I clicked a couple of times on the avast icon while it was updating the virus database, opreration which failed. Since then, avast does not run, and reports a very similar invalid-argument message. So I uninstalled (with sudo dpkg -r <avast-name>) and reinstalled (sudo dpkg -i <avast-name>.deb), with supposedly the low-size initial database. But avast insists in not running, and giving the same message. So I uninstalled.
I will try to manually increase the limit. But, again, there is something wrong, it seems, with the description, and maybe the origin of the problem that is have just described is different from the share limit.
Thanks. Best regards,