When I use the try tool of WSO2 Data Services in link:
.../services/User_DataService?tryit
The exceptions generated for the data service are accessible just in the log file, within the sever (.../repository/log/wso2carbon.log).
Is possible receive the full exception in the "Reponse" block when I use the try tool?
Normally you are getting a SOAP fault message with proper reasoning in Data Services when an exception occurs. You will not be getting the complete error log as it is but a meaningful to understand it.