Still no ideas? May be some screenshots can help you to understand a point of issue. At least they are a bit more clear than my English
Trying to open an attachment (.xls file)
Error message in MS Excel (text on Russian - "unable to open")
The next error, it appears after clicking "ok" in previous dialog box.
Sorry for a lot of Russian text. It means next:
Application MS Excel unable to get access to a file <file>. It may be initiated by one of next reasons.
- Using of nonexistent file or path
- File is using by another program
- The name of opening book coincides with name of already opened book
Any suggestions?