I created a maintenance plan a week ago and it's been executing fine every night. Now the Database Shrink task has stopped working and throws this error:

Property Size is not available for Database '[master]'. This property may not exist for this object, or may not be retrievable due to insufficient access rights.

Yesterday I installed a couple of SQL Server hotfixes offered by Windows Update (4411 and 4457, if that matters). It's the only change I've possibly made.

My task looks like this:

• Connection: Local server connection (sa)
• Database(s): All databases
• Shrink database when it grows beyond: 50 MB
• Amount of free space to remain after shrink (10%)
• Return freed space to operating system

Some of my findings:

• If I generate the T-SQL code and execute it manually it runs flawlessly.
• If I create a new maintenance plan with an identical Database Shrink task it runs flawlessly.

What can the problem be?

I created a maintenance plan a week ago and it's been executing fine every night. Now the Database Shrink task has stopped working and throws this error:

Property Size is not available for Database '[foo]'. This property may not exist for this object, or may not be retrievable due to insufficient access rights.

Yesterday I installed a couple of SQL Server hotfixes offered by Windows Update (4411 and 4457, if that matters). It's the only change I've possibly made.

My task looks like this:

• Connection: Local server connection (sa)
• Database(s): All databases All user databases
• Shrink database when it grows beyond: 50 MB
• Amount of free space to remain after shrink (10%)
• Return freed space to operating system

Some of my findings:

• If I generate the T-SQL code and execute it manually it runs flawlessly.
• If I create a new maintenance plan with an identical Database Shrink task it runs flawlessly.

What can the problem be?