We're running SQL Server 2012 (SP 4) build 11.0.7001.0. SSMS is running from the "110" folder, if that helps. The OS is Server 2016 Standard, running RDS. I've tried to recreate the error message I received, but it is no longer coming up (despite *not* hitting "do not show this message in the future" button). The error message I received when trying to modify/edit the maintenance plan was similar to the error message as portrayed in this post:https://www.sqlservercentral.com/Forums/Topic1699525-3411-1.aspx
Yes, I realize this is for a newer version (12.0, not 11.0), but this was the closest match I could find to the error message at the time...
That being said, I followed the instructions (including ignoring the log file) and found the paths mentioned. Neither of the folders contain any "weirdly named" folders nor do they contain the referenced "ssms.exe.config" file. My guess is that there are no non-standard extensions that have been installed.
I can tell that "MS VS 2010 Shell (Isolated)" & "MS VS 2010 Prerequisites - English" have been installed, but those might not have anything to do with this.
I can get a "Maintenance Plan Wizard" to show, but there is seemingly no response from selecting "New Maintenance Plan..." or "Modify" (on the existing one).
The only reason I even encountered this was that I wanted to verify the number of days it was set to keep backups (thought I'd set it to one month), but it seemed to be keeping too many. Today is right about the threshold where it should start deleting the old .bak files, so I might have jumped the gun a little bit, but the error message and (now) not even responding is concerning to me. I can "View History".
Please let me know if there's any additional information I can provide.
Microsoft SQL Server Management Studio 11.0.7001.0
Microsoft Data Access Components (MDAC) 10.0.14393.0
Microsoft MSXML 3.0 6.0
Microsoft Internet Explorer 9.11.14393.0
Microsoft .NET Framework 4.0.30319.42000
Operating System 6.3.14393