fatal error (ARX)

[The Courage Dog]

i received a drawings from outside, when i open them & use the XREF command, autocad is qutting & showing this ARX error : can anybody know how to eradicate this annoying error.....thanks in advance..

the courage dog

[Strix]

do you have the XREF file too?

[The Courage Dog]

there are no xrefs on it.