XeTeX ⇒ xparse error Undefined control sequence \filename

[cyberscientist]

Hi all
I cant figure out why this error is thrown back at me.
help me plz.
thanx

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("C:\Program Files\MiKTeX 2.9\tex\latex\l3packages\xparse\xparse.sty"
! Undefined control sequence.
<argument> \filename 
                     
l.57 ...\filedate}{\fileversion}{\filedescription}
                                                  
? 
! Emergency stop.
<argument> \filename 
                     
l.57 ...\filedate}{\fileversion}{\filedescription}
                                                  
End of file on the terminal!

 
Here is how much of TeX's memory you used:
 4627 strings out of 494053
 76842 string characters out of 3148609
 103919 words of memory out of 3000000
 7916 multiletter control sequences out of 15000+200000
 3640 words of font info for 14 fonts, out of 3000000 for 9000
 715 hyphenation exceptions out of 8191
 32i,0n,27p,383b,53s stack positions out of 5000i,500n,10000p,200000b,50000s
!  ==> Fatal error occurred, no output PDF file produced!

[cgnieder]

Have you ckecked if the l3kernel is installed on your system?

[josephwright]

There was an error in an upload to CTAN a couple of days ago, which is now fixed. This will propagate to MiKTeX, but may take a week or so. For the moment, you can edit the file

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C:\Program Files\MiKTeX 2.9\tex\latex\l3packages\xparse\xparse.sty

changing the line

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{\filename}[\filedate}{\fileversion}{\filedescription}

to

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{\ExplFileName}{\ExplFileDate}{\ExplFileVersion}{\ExplFileDescription}

Sorry for the inconvenience.

[cyberscientist]

Thanks Joseph.
I carried out the change to
[*]{\ExplFileName}{\ExplFileDate}{\ExplFileVersion}{\ExplFileDescription}[/*]
As you said, but I'm still getting the same error, Which is strange as it shouldn't exist any more.

[pacikk]

Works perfectly for me. Thanks!

[cyberscientist]

Ok it works for me now.
I had a permission issue. I couldn't write on the file.
Thank you once again.