All Oracle Error CodesOracle DBA Forum

OCI-21600:

path expression too long
Cause: The path expression that is supplied by the user is too long. The path expression is used to specify the position of an attribute in an object. This error occurs when one of the intermediate elements in the path expression refers to an attribute of a built-in type. Thus, the OCI function cannot proceed on to process the rest of the elements in the path expression.
Action: User should pass in the correct path expression to locate the attribute.