Excel showing "ERROR" Global Status

[ehcpieterse]

Hi guys, I only recently started using the Guardian features linking to Excel (Office 2010). Last night I played with small amounts on the international soccer friendlies. My formula for triggering the Greening is =IF(Green_Status="Yes","GREEN_ALL",""), in cell L6. When the trigger occurs, cell O6 just returns "ERROR".

The prices are feeding correctly, but I suspect I missed something in linking the sheet. I would appreciate any feedback as someone here has probably done the same thing at some point.

Thanks in advance,
Ed