schrieb Joseph Wright:

> We really need to see all of you log file. The latest release versions
> of the LaTeX3 material all work fine, and define \ExplFileName, etx. I
> suspect that something is being loaded 'out of place', but without the
> full log can't tell.

Sorry for not sending the full log file in the first place.  I have
suspected it's a problem with the recent reorganization in l3 packages.
 But since you can't reproduce it ... perhaps it's a Windows specific TL
packaging error (Windows 7 Prof. x64)?

Anyway, here's the log.  Unfortunately, batchmode doesn't give me a full
package list.

Best regards,
Stephan Hennig