The file couldn`t be export WINDOWS

[#1]

Lightroom informs that "the file couldn`t be export"

Why?

[#2]

Lightroom informs that "the file couldn`t be export"

Why?

[#3]

Tell us the complete, unedited, word-for-word error message. Also please state the version NUMBER of your Lightroom and please state the version NUMBER of your operating system. Do not use words like "up-to-date" or "current".

[#4]

Welcome to the forum, as DJ says more info. See the screen capture from the forum guidelines.

[#5]

Are youu using Smart Prieviews?

If so, wherevis the original photograph?

Is the photograph on an external hard drive?

Is tgat external hard drive connected, on?