I have inserted a table.
In a table cell, I have inserted the following commandline:

{viewfile:STEP Data Quality Product Brief - 2009 ENG-US.pdf|width=400|height=300}

A message pops up telling me that the PDF is being converted. Please refresh after some time.

When I refresh after some time, I end up with a message that an error has occured, and that I should report this issue, with a link to your support site.

I have also tried the same with the following commandline:

{viewfile:STEP Data Quality Product Brief - 2009 ENG-US.pdf}

, hence leaving the width and height as default, but that makes no difference.

I think this issue is related to issue Conf-16922.

I attach a screenshot of the error, and the PDF file that I try to get converted into an Confluence embedded file.