Doing nothing when trying to output potfile

[ribena]

I have cracked hashes with the --username arg originally that had format (user : pass : salt) and the pot file has the cracked hashes in (hash : salt : plaintext) and I have the original hash file. So I am trying to output them into a seperate file and combine them back with usernames (user : plaintext) using command

Code:

hashcat64.exe -m 120 --potfile-path=filename.pot --username --show -o "outfilehere" --outfile-format=2 "originalhashfilehere"

pause

Like I have always used but it just seems to launch and then sit there, doesn't error/doesn't end/just sits open...
Usually I launch this and its completed in 20 seconds tops?

Any ideas?

Just to add I am using latest version (5.1.0) on windows 10 - I used to use 3.1.0 and that command worked fine to output them has something changed?