Attribute is not declared for the element or entity.
#6090 Run-time catchable error
Attribute is not declared for the element or entity.
Additional Information
For element 'X' : For attribute 'Y'.
or
For external entity 'X': for attribute 'Y':
or
For element 'X': for element attribute 'Y'= entity "Z": for
attribute 'W':
Explanation
Only attributes returned with an element or an entity can be
referenced.