Problem previewing raw mfx files

when first imported in premiere pro (cc7.2.1) of mxf 4k files sony f55 worked perfectly. preview files in source window , use metalogging skim through them. additionally create , export sequences , preview them in realtime @ 1/2 resolution - preview quick , fluid.

 

two weeks later , i'm struggling sort of preview on same premiere projects. open project, , if try preview clip in source window frame 1 , audio, never sort of playback. if try preview sequence media pending, black screen or audio only.

 

i haven't moved clips original folder , isn't complaining can't find them. never seems render them no matter how long leave it. imported whole camera archive in tact, , new project same archive won't preview.

 

interestingly, if use direct link speedgrade play instantly in speedgrade

 

i'm using mbpr cuda mercury.

 

when open project avchd files seems work ok, of several projects have these mxf raw files fail preview anything.

 

any appreciated.

 

 

update: believing problem preview tried render out sequence worked before. took long time , ended black file , audio, no picture, there seem issue. sony raw viewer views , plays these files arn't corrupt.

having same issue. video plays in sony raw viewer perfectly. once imported premiere cc there no thumbnails, video plays merely black - though recognizes video files enough display them in timeline @ correct length, no image.

 

if import these files older projects in sony 4k raw mxf files worked fine new ones still don't work , somehow manage make old files won't play either.

 

attached images of same files in sony raw viewer , premiere cc reference. have no idea has changed in past month or mxf files no longer work in premiere cc advice appreciated. fortunately have sxs files edit can keep working nice if use raw files @ point.

 

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