I am trying to refresh my access token using the refresh token

[George_Mujuru]

I am trying to refresh my Access Token using the refresh token that I have been given however I am encountering the following error

{"errors":[{"errorType":"oauth","fieldName":"authorization","message":"Invalid authorization header format: %s"}],"success":false}

I have created the appropriate authorization header so I am now confused

Thanks in advance

[freeubi_tep]

Can you post the code? Or the header format.

[George_Mujuru]

@freeubi_tep Thanks I actually found out today what my error was. I was using and android service and somehow in my code it was sending null values in my Refresh request for the refresh token and the base64 concatinated stuff.