Oracle Error Message
ORA-19151: XQST0093: It is a static error to import a module M1 if there exists a sequence of modules M1 … Mi … M1 such that each module directly depends on the next module in the sequence (informally, if M1 depends on itself through some chain of module dependencies.)
Reason for the Error
An error occurred during the processing of the XQuery expression.
Solution
Check the detailed error message for the possible causes.