How to solve the issue of no response when exporting a dmp file in PL/SQL?

There may be no response when exporting a DMP file in PL/SQL due to the following reasons.

1. Permission issue: Make sure you have the necessary authorization to carry out the export operation. Insufficient permissions could prevent the operation from being completed.
2. Input error: Make sure the command you entered is correct, ensuring correct syntax and table names. Any errors may cause the export operation to fail.
3. Large amount of data: If there is a large amount of data, the export operation may take some time to complete. Please be patient and wait for the operation to finish.
4. Log file: Check to see if a log file has been generated, which may contain detailed information about any failed export operations.
5. Retry the operation: attempt to redo the export operation, as sometimes the operation may fail due to temporary network or system issues.

If none of the above methods are able to solve the issue, it is recommended to get in touch with the database administrator or technical support for further assistance.