Editing Iptc information script stopped working

[jfavelle]

I have a script that takes the first letter of the file and sets the iptc:category information with that info that was working fine until last week.

I'm now getting an error saying
Tag '_' not defined
and
No Writeable tags set from (imageName)

The script is:
exiftool "-iptc:category<${filename;$_=substr($_,0,1)}" -overwrite_original *.jpg

Thanks in Advance

[Phil Harvey]

I assume you are running in Windows because of the quoting.

You must be using an old version of ExifTool to get this error.  Type "exiftool -ver" to see the version.

- Phil

[jfavelle]

Thanks Phil,

Thats fixed it.