I am working on a black box web application pentesting project for a client and while testing found an error-based SQL injection. I went on to exploit it using SQLMAP, I retrieved the Database names, Tables names, and Column names but when I try to dump any of the columns it says
"unable to retrieve 'column_name' in table 'table_name' from the database 'database_name'"
I tried it for other columns and it gives same error and shuts down. Am I doing something wrong? Or the IPS on the client end is blocking the dump?