update gpsaltitude deletes all other existing tags

[Egon]

Hello,
I have updated all my files to add gpsaltitude with the following command:
exiftool -charset filename=cp1252 -exif:gpsaltitude=xxx filename.
All files have been updated, but in some files all existing tags (keywords, categories, other gps tags, user defined tags etc) are deleted. Only gpsaltitude is present.

[Phil Harvey]

I think that something else is going on here.

If you attach a sample file, before and after the command, we can help you to understand what is happening.

My guess is that the file doesn't have these other tags to begin with.

- Phil

[Egon]

You're right. The files had no tags because autosynchron in Daminion was switched off. Forget the request.