x64 - Error message

[XY fan]

Which I get on SOME copy actions is attached. Hope this one is 'useful' - and not just me!

[phred]

If you really want Don (or anyone) to help, you should ALWAYS include the XY version number, whether you're using 32bit or 64bit, and the EXACT steps to reproduce the issue.
In this case, HOW were you copying? And from/to where? Drag and drop? Left or right drag? Context menu? From list/tree/tab/desktop to where.

None of us are mind readers.

[XY fan]

Just not wanting to disappoint Don who reputedly thinks most people posting are trying to be as vague as possible .

But, I thought it was all in the attachment including the error message. However, yes, x64 v27.90.0006 and copying using TB button and pasting also using TB button.

[RalphM]

And changing the subject from "Error message" to "... x64" helped immensely to reduce the vagueness of this post.
Everyone will jump right in, thinking "Yes, I've seen an error message before"