Jason,

Could you explain more about your intention?  Why do you want to convert VLEN 
to opaque data?  Thanks.

Ray

On Sep 25, 2012, at 10:14 AM, Jason Sommerville wrote:

> I encountered a problem when attempting to register a conversion function to 
> convert VLENs to an opaque data type. After some digging, I came across this 
> three-year-old thread
> 
> http://hdf-forum.184993.n3.nabble.com/hdf-forum-VLEN-conversion-problems-td193957.html
> 
> which describes my problem exactly. To sum up, the memory buffer passed to my 
> conversion function appears to point to heap ids rather than to valid memory. 
> Also, and this was not mentioned in the older thread, the buf_stride 
> parameter is set to zero. Supposedly a bug report was filed (where?).
> 
> 1) Has any progress been made on this issue?
> 2) Is there another way around this problem?
> 
> One idea that occurred to me is that it is conceivable that under normal 
> operation a built-in conversion function is normally called that converts 
> from the heap representation of VLENs to the memory representation. If so, is 
> there a way to call that function from my conversion?
> 
> Thanks,
> Jason
> 
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