one drive. - directory name is invalid- file is open in another program

Hi Guys,
I got sharepoint in office365.
got multiple folders in a site.
users got one drive client and everything syncs to it.
all folders works fine. except one folder. whenever i try to open a file from that folder it keeps on saying. the "file is open in another program" or the "directory name is invalid". but it works fine when i open in webbrowser. and its the same problem for all users. so its not a local computer issue.

I also tried syncing to a new computer and still same issue with that particular folder.
things i have tried.
1.synched to new computer- same issue
2 tried resynching. reinstalled one drive. re synched same issue
3. tried renaming the folder in the cloud console and tried resynching- same issue.

not sure what else to do. any ideas would be great.
please have a look for the error messages.
Mr.XAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Shreedhar EtteCommented:
Folder in question does not have any of the below:

These names aren't allowed for files or folders: .lock, CON, PRN, AUX, NUL, COM1 - COM9, LPT1 - LPT9, _vti_, desktop.ini, any filename starting with ~$.

Notes:

"_vti_" cannot appear anywhere in a file name

"forms" isn't supported when the folder is at the root level for a library.

You can’t create a folder name in SharePoint Online that begins with a tilde (~).
Shreedhar EtteCommented:
Please share the screenshot of the folder path and name. Also error you are getting.
Mr.XAuthor Commented:
hi guys,

sorry about the delay. but i found the problem and fixed it. no issues for few days now.
its just the length of the folder path. there were many subfolders/child folders. i guess microsoft would have updated the security policy on one drive, thats why i had issues suddenly.
but now after reducing the child folders, it started working.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft OneNote

From novice to tech pro — start learning today.