Windows 10 editing PO files

Greetings,

I have downloaded a PO file and used a pretty basic text editor (editpad) to modify and insert proper DE translations into the file. I fixed all the UMLAUTS by using the windows ALT-nnn key presses. German has 7 UMLAUTS, and all of them are in use in the PO file.

When completed, I uploaded the PO file only to receive a bazaar email from the administration:

--------------------------------

Hello Chris Wiesner,

On 2017-01-06 23:19z (2 hours 34 minutes ago), you uploaded a file with
German (de) translations for skychart in Skychart trunk to Launchpad.

We were unable to import the file because of errors in its format:

Line 16: Could not decode input from UTF-8

If you use gettext, you can check your file for correct formatting with
the 'msgfmt -c' command. Please fix any errors raised by msgfmt and
upload the file again. If you check the file and you don't find any
error in it, please look for an answer or file a question at
https://answers.launchpad.net/rosetta/

For your convenience, you can get the file you uploaded at:
http://launchpadlibrarian.net/301500804/de.po

Thank you,

The Launchpad team

--------------------------------------

I re-loaded the file in my EDITPAD text editor and look at line 16. This is what it looks like here:

#: u_translation:rsdeg

It is only the second comment line prefixed by a #. (The first one is in line 1. )

I fail to see what is wrong with this. Would someone please enlighten me.

Also, if this is a UTF-8 issue, how do I determine what the structure/designation of my file is. Windows explorer is pretty light in this regard.

Regards,
Chris