Hello, In last 2 days some AutoCAD commands disappeared-DDATE, UNITS (Unknown command "UNITS"). Anybody know what can be the problem? Thank you

I just realize that also REFEDIT and XOPEN not working...

Did you recently download and use any custom lisp routines?  Did you try a REPAIR of the installation?  Note that a REPAIR is not the same as an Uninstall/Reinstall.

I did write one lisp routine, nothing to do with these commands, I already unloaded it, doesn't help.I will try the REPAIR tomorrow. Thank you

Is it an English version of AutoCAD? Plain AutoCAD, not e.g. Civil 3D? Try the dotted version of the command ".UNITS". There could be also a problém with the Registry settings - this would need a repair installation.

Yes Vladimir, it's plain English version.But I resolved it by REPAIR. Thank you all!

Good to hear and thanks for the update.

Thank you for sharing.