-16052 NAN CANNOT BE USED AS A FLOAT OR DOUBLE VALUE IN A DATETIME OPERATION. ERROR QNAME=ERR:FOCA0005.

Explanation
The value NaN was passed as an argument
to a datetime operation, but that value is not valid for datetime
operations.

System action
The XQuery expression
was not processed.

Programmer response
Pass a valid float or double value to the
datetime operation.

SQLSTATE
 10602