When importing recordings with setup there is a button to change the channel associated with the recording (useful if the channel name has changed since recording was made) but pressing this button results in a pop up of

Changing the recording's channel failed:
The parameter frm was null (not allowed here).

h4. Steps to Reproduce
Delete recordings from your database
Go to import tab in setup
select a recording and click on the change channel button

expected behaviour is that a list of channels appears in a window
current behaviour is that an error message pops up