what is meant by "The handle is invalid" while copying files?

[V S Rawat]

After installing 7.6.2 64bit today on w8.1-64, I copies my data backup to programfiles, programdata and users folders.

however while copying to programdata folder, TeraCopy threw this message.
screenshot

it was only for these 3, and all the other files got duly moved to 3 folder/ subfolders.

I am absolutely unable to understand what is meant by “The handle is invalid” while copying files? Any clue?

Thanks.

[Meta Chuh]

@V-S-Rawat

was notepad++ running when you tried to copy your plugins folder with teracopy ?

inline screensot of your error messages:

if no: were you able to copy them using windows explorer ?

[Eko palypse]

@V-S-Rawat

just one story why such thing might happen.