LoadFromFile Hanging

Delphi.

Basically, this code has been running fine, but our application hung when it came across a corrupt pdf, rather than get trapped and handled by the except block it just hangs.

We know it is a bad PDF file because when we open it in Acrobat viewer we get this message: "There was an error opening this document. The file is damaged and could not be repaired."

So Adobe acrobat can trap and handle it, why will the current code not trap it:

//Note QP was created before and tmpfilepath has been set......as we mentioned it works fine for a good pdf file, so why do we not get the BADFile message

try
  QP.LoadFromFile(tmpFilePath);   //tmpFilepath is valid and points to the pdf
  showmessage('OK');
except
  showmessage('BAD File?');
end;


This is a link to the bad pdf.

It is vital to be able to handle bad pdf's to allow applications to handle gracefully and keep on processing....especially in batch systems.

We also tried variations of loadfromfile like
if QP.LoadFromFile(tmpFilePath) = 1
if QP.LoadFromFile(tmpFilePath) = 0

But still hangs.

Kind Regards
Mark