Hello, I Had a repport that worked fine in JasperServer 7.1 After upgrading to 7.5 the same repport doesn't work anymore. I got the following error message : "ERROR IntrusionException,pool-5-thread-521:55 - [sECURITY FAILURE Anonymous:null@unknown -> /ExampleApplication/IntrusionException] INTRUSION - Mixed encoding (2x) detected " " Error during report execution com.jaspersoft.jasperserver.api.JSSecurityException" I understand that a security check causes the exception, and I found the SQL instruction that causes the problem SELECT REGEXP_REPLACE(CODE_ANALYTIQUE,'^(.){4}(.*)([[:digit:]]{3}$)','2-3') AS PROJET FROM MYTABLE and if I modify my query like this SELECT SUBSTRING((CODE_ANALYTIQUE,....)-SUBSTRING((CODE_ANALYTIQUE,....) It works fine. But I prefer to use the REGEXP_REPLACE statment rather than the SUBSTRING So what is the cause of tis exception, and how can I fix it ? Thanks