because it has a DefiningQuery and no  element exists in the  element
100051
Unable to update the EntitySet - because it has a DefiningQuery and no  element exist
93877
Why is the empty document an error?
143003
$\bigcup \emptyset$ is defined but $\bigcap \emptyset$ is not. Why?
32425
'Contains()' workaround using Linq to Entities?
33922
Getting nosuchElement Exception for a web element even though I tried all possible solutions
146891
Why is $\{\emptyset\} \not = \emptyset$?
148343
The sum of the elements in a field of at least three elements is 0
144878
What is meant by 'The specified LINQ expression contains references to queries that are associated with different contexts'
109376
Is indexing a new map element and having something that reads it assigned to it undefined behaviour, or just unspecified?
21670
Why does an infinite limit not exist?
155520
Why does $('#id') return true if id doesn't exist?
88087
Why does this say there is no join predicate?
123498
Is "empty set" an element of a set?
26008
Why there is a unique empty set?
104905
Check if XML Element exists
14512
Why cannot a set be its own element?
96974
How can adding a Subselect make a SOQL query non-selective?