Unable to Copy

Hi All,

I am trying to copy a group of atoms from one file to another and everytime I try, I get an error. I select the atoms I wish to copy and then I press control+c and get the following error "Method '~' of object '~' failed", the same thing happens if I go to edit then copy. If I then click OK and trying copying the same thing again without closing the file, it comes up with the error "Out of memory". If I close the file and reopen it and get the error "Method '~' of object '~' failed" again. I am using Materials Studio 6.0.0 on Windows 7 64bit.

Any help would be greatly appreciated.

Matt