[Value] 11 [Description] user agent may use this code if an operation depends on state cached in an interface object that has changed since it was read from disk. Which values will actually go stale? Modification time, name, more rarely type. If an atomic save [replacing a file with a new one of the same name] happens underneath, should we even be required to notice? [Name] 
INVALID_STATE_ERR
N O _ M O D I F I C A T I O N _ A L L O W E D _ E R R
N O T _ F O U N D _ E R R
I N V A L I D _ S T A T E _ E R R
I N V A L I D _ M O D I F I C A T I O N _ E R R
S E C U R I T Y _ E R R
A B O R T _ E R R
Q U O T A _ E X C E E D E D _ E R R
N O T _ R E A D A B L E _ E R R
E N C O D I N G _ E R R