A proprietary spreadsheet my son created for a client of his now blows up on
the client's machine. This is version 46. Excel version is 2000. The previous
45 versions of the spreadsheet have not had this problem. We cannot reproduce
the error on any computer here.

The client says the error is reproducible when running the print macro.
Works fine for my son.

By blowing up it means he gets the message "Microsoft Office Excel has
encountered a problem and needs to close. "

The client snapped some screen shots on running the Send Error Report.

AppVer 11.0.81.46.0
ModName msvcrt.dll
ModVer 7.0.2600.2180
ModStamp 41109752
fDebug: 0
Offset: 000372e3

Any idea of what went south on this?