David,

When you say that the "result is an empty picture", does the resulting picture 
have any bytes and/or dimensions, i.e. did you try checking it with Picture 
size and PICTURE PROPERTIES commands?

I wonder if the issue is with the parameters that you are passing to the  
CREATE THUMBNAIL command? But then again, I am sure you must have double and 
triple checked that...

Regards,
 
Narinder Chandi,
ToolBox Systems Ltd.
 
I am available for new consulting opportunities…
http://4d.1045681.n5.nabble.com/ANN-4D-Developer-Available-td5765443.html
-- 

-----Original Message-----
From: 4D_Tech <[email protected]> on behalf of 4D Tech Mailing List 
<[email protected]>
Reply-To: 4D Tech Mailing List <[email protected]>
Date: Friday, 20 September 2019 at 18:27
To: 4D Tech Mailing List <[email protected]>
Cc: David Ringsmuth <[email protected]>
Subject: Picture Reduction / Conversion (2)

    4D v17.4 234574
    Windows 10 Home
    
    Using Paint.net to open the PNG and save it as a JPG works fine.
    
    The resulting JGP is perfect.
    
    David Ringsmuth
    
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