Recordings disappear. Notice: Undefined index: field_id in audiorecorderfield_nanogong_file_receive

After recording and uploading a file on a content type, the files are missing from the nodes when viewed immediately after saving.

I'm getting the following in the recently logged messages ...

Location https://www.site.co.uk/?q=nanogong_file_receive

Messages:

Notice: Undefined index: field_id in audiorecorderfield_nanogong_file_receive() (line 45 of /pathToD7/sites/all/modules/audiorecorderfield/audiorecorderfield.module).

Notice: Undefined index: voicefile in audiorecorderfield_nanogong_file_receive() (line 49 of /pathToD7/sites/all/modules/audiorecorderfield/audiorecorderfield.module).

Notice: Undefined index: error in file_save_upload() (line 1410 of /pathToD7/includes/file.inc).

Notice: Undefined index: tmp_name in file_save_upload() (line 1424 of /pathToD7/includes/file.inc).

ERROR - file_save_upload failed

I'm also getting:

Warning: implode() [function.implode]: Invalid arguments passed in implode() (line 1574 of /pathToD7/includes/form.inc).

but I'm not sure if this is or is not related.

The warning on line 1574 is mentioned in a Pathauto issue here: http://drupal.org/node/1012340