in the viewer the clip seems OK. I believe also is a sequence/timeline issue. The sequence has the same settings with the video footage. When i insert them in the timeline FCP does not pop up any format and timeline does not need render either. So this tell me that video footage and sequence are ok.
I have install xdcam codec again but nothing helps.
I have work other projects in the past with the same setup but its the first time happening to me.