OpsCenter: Media Request alert shows "null" for barcode...

I have a "Media Request" alert configured in OpsCenter... the trouble is - it sends email with no barcode. Is this an issue with OpsCenter or am I doing something wrong? Here is the email it sends out:

Alert Raised on: August 14, 2013 11:30 AM Tree Type : Server Tree Name : ALL MASTER SERVERS Nodes : Denver - DC 55
Barcode:
MediaServer:
Density:
evsn:
Mode:
Request ID:
rvsn:
User:
Volume Group:
Request Time: August 14, 2013 11:30 AM
Alert Policy: Media Mount
OpsCenter Server: deninfrap11
Severity: Informational

Screenshot of the details of the alert in OpsCenter: