Hi Vladimir, You could try: https://github.com/cschwan/sage-on-gentoo/issues/93 In the issue there was an IPython-0.10.1-py-2.7.egg-info file that was floating around. However, if this fixes things, it's odd that it's appearing again with 4.8, unless your ipython was recently upgraded? Steve On Thu, 26 Jan 2012 16:58:55 +0200 v_2e@ukr.net wrote: > ---------------------------------------------------------------------- > Hello! > After upgrade to Sage 4.8 I cannot start it and get the following > error message: > > > | Sage Version 4.8, Release Date: 2012-01-20 | > | Type notebook() for the GUI, and license() for information. | > ---------------------------------------------------------------------- > Traceback (most recent call last): > File "/usr/bin/sage-ipython", line 19, in > from IPython.CrashHandler import CrashHandler > ImportError: No module named CrashHandler > > > Is it a known issue? If it is, what is the solution? > > Thanks. > Vladimir > > ----- > >