SCCM 2012R2 Reporting services error

Hello, my name is Miguel. I have upgraded my SCCM 2012 to 2012R2. Until that the reports was working fine, but after the migration the reports not works anymore.
I got this error when I try to generate the report:

sccm erro
I also attach the srsrp.log. Analyzing the log I found that line

"The path of the item 'Report name' is not valid. The full path must be less than 260 characters long; other restrictions apply. If the report server is in native mode, the path must start with slash. ---> Microsoft.ReportingServices.Diagnostics.Utilities.InvalidItemPathException: The path of the item 'Report name' is not valid. The full path must be less than 260 characters long; other restrictions apply. If the report server is in native mode, the path must start with slash.~   at Microsoft.ReportingServices.WebServer.ReportingService2005Impl.GetPolicies(String Item, Policy[]& Policies, Boolean& InheritParent)~   at Microsoft.ReportingServices.WebServer.ReportingService2005.GetPolicies(String Item, Policy[]& Policies, Boolean& InheritParent)  $$<SMS_SRS_REPORTING_POINT><10-06-2015 10:05:38.055+180><thread=7784 (0x1E68)>"

I appreciate any idea or helping from you.
Thank you!
Cóppola & GarcíaAsked:
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Vitor MontalvãoMSSQL Senior EngineerCommented:
Hi Miguel,

More information is needed so we can help you better.
How did you perform the upgrade? In place or side by side? Did you follow any procedure? If affirmative and if possible please share the link to the procedure.
Cóppola & GarcíaAuthor Commented:
Hi Vitor,  I performed an in place upgrade.
I followed the steps from this link:
From the "Installation" part.


Vitor MontalvãoMSSQL Senior EngineerCommented:
There is a section for Name Confusion and Pre requisites. Hope that you read those two sections very carefully.
I've found this article that can help you. Give it a try.
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Cóppola & GarcíaAuthor Commented:
Vitor, I have found duplicates reports as I show on the capture, the working ones are marked in black.
The other ones that star with an underscore are not working. I think this new reports was generated with the upgrade. I was executing the not working reports.

Do you think is it safe to delete the "underscores" reports?


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Cóppola & GarcíaAuthor Commented:
So I've also executed:
mofcomp.exe C:\Program Files (x86)\Microsoft SQL Server\100\Shared\sqlmgmproviderxpsp2up.mof
Maybe this helped to fix the problem.
Thanks for helping me.

Cóppola & GarcíaAuthor Commented:
I have tested the solution. The reports with underscore are not working well.
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