Failed to open file, The file could not be parsed

[David W Barton]

I am shooting HEIC x.fine (~7mb) from Sony A7iv.  When I try a new HDR merge, I load three bracketed images.  When I hit OK to start the merge, I get the error in the subject.  

Failed to open file, The file could not be parsed.

When I use HEIF from my iPhone 12 Pro Max (~2.5mb), they work ok, no error.

If I just try and import one HIEC photo from my Sony, I also get an error.  But I can import the HEIC shot from my phone, no issue.  

They open fine in other apps.  Photos for example.  I have been doing basic edits of brightness, shadows, etc using the built in iPad photos app.  It also opens them for people edits in PS Express.  Sometimes when I open them for other edits in PS Express I get an error too.  I have attached a bracketed series that I was trying to use to test HDR with affinity.

I am brand new to Affinity Photo and purchased it for the HDR merge.  Maybe I am missing something about what file format or size limits there are?  Can you help?

@Callum

[EmT]

Hi @David W Barton

I can see you have previously started a thread regarding this same issue here. 
It is best to keep everything to one thread rather than start a duplicate.