The requested operation cannot be performed on a file with a user-mapped section open

Question

_{Thursday, March 14, 2019 2:26 PM}

Hello there,

we just started to get the following error when we build/rebuild the solution with VS 2017 (The requested operation cannot be performed on a file with a user-mapped section open). we tried almost everything from updating windows, updating VS and restart the machine few time but not luck, this is happening not only for me but the all our team running Windows 10.

Any idea, suggestion would be greatly appreciated.

 Thanks

VSTS Specialist

All replies (3)

_{Friday, March 15, 2019 9:12 AM}

Hi Musti Hanah，

Thank you for posting here.

Since your question is more related to VS, I will move it to Visual Studio General Questions for suitable support.

Does this error occur on all projects? 

Best Regards,

Wendy

MSDN Community Support
Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to MSDN Support, feel free to contact [email protected].

_{Friday, March 15, 2019 12:15 PM}

Hi Musti Hanah,

Welcome to the MSDN forum.

“The requested operation cannot be performed on a file with a user-mapped section open”, generally indicates some DLL are locked.

Please go through with the following steps to troubleshooting it:

1. Temporarily disable all anti-virus and firewall
2. Open task manager – close all process
3. delete obj folder, close all instances and reopen vs as admin to rebuild again.

meanwhile, there are some members discussed with similar thread and you should have a look: https://stackoverflow.com/questions/4658354/the-requested-operation-cannot-be-performed-on-a-file-with-a-user-mapped-section .

Please feel free to let us know if it works or not.

Sincerely

May

MSDN Community Support Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to MSDN Support, feel free to contact [email protected]

_{Tuesday, March 19, 2019 7:53 AM}

Hi David,

Sorry to bother you, I want to confirm if you solved this issue?

Any new process or feedback is expected and if you were going forward not to stay in here, please ensure if my reply is helpful or not and then mark it as answer. After that, I will help you to close this issue, meanwhile, it will appear in our forum as a solved issue be referenced.

May

MSDN Community Support Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to MSDN Support, feel free to contact [email protected]