Indexing in a folder always stops at the same file

I am trying to share a folder that has many thousands of image files. Serviio begins indexing but only 2432 files and no more. The log file shows all those folders being indexed but there is no error message indicating why it stopped at that point. Removing the next few files in the list from the folder doesn't help. If I move a large number of files from the folder from further down in the alphabetical list to a new folder and share that folder it indexes correctly. I suspect there must broken file or files but How do I find them if there is no error message in the log file?

[atc98092]

You could try enabling detailed logging to see if that helps identify the problem file.