Hi
VP 6.30 with a old-slow Vista PC
With a long NEW project just placed on the timeline for the first time I sometimes get that message as the cache is filling. It's normal if you try to start anything before VP has sorted the clips out and placed copies etc into the cache file. In general wait for the thin green bar over the timeline to finish.
Playing the timeline before this is completed will cause playback stoppages. The clips however will generally play OK as they have already been processed by the time their thumbnails appear in the clip bin.Assembling the timeline usually takes longer depending how many clips are added..singly or all together.
Even when you think the files are sorted and the green bar is complete there are occasions when the sound files are still processing. :rolleyes:In this event if you try anything VP shows a message letting you know this. In general you just have to wait.
In connection with the thin green progress bar. Sometimes (here at least) this stops, usually at a clip join but I have no idea why. If I see this I click the clip that is waiting or move the cursor line and this seems to give VP a nudge and the progress bar then carries on.
Check your cache file is not full by clearing out unused old files.
What format of clip; resolution and size are you loading?
Nat