When I am importing .AI files this error message appears: ** (inkscape:9542): CRITICAL **: file document.cpp: line 511 (void sp_document_set_uri(SPDocument*, const gchar*)): assertion `document != NULL' failed

Pleas help, how can I solve it? I have thousand .AI files which I could open in 0.39. Is downgrade only one solution? (OS: Gentoo unstable, same expirience with self compiled inkscape 0.40cvs and 0.40 stable in Slackware current)

Thanks Martin Grohman