Hello Bob Wood
The first case is a known issue, and a bug ticket (637357) has already been filed for this on which the developers are investigating. While it still has been difficult to pinpoint the cause. Would you please provide the workflow (what type of analysis you had done in discovery, were the files saved on local system, etc.) after which this is occurring? Is the file attached here native to SpaceClaim? I will then provide the information to the development so they can comment on it.