You can use the syntax rule restart_spec to fulfill the condition for restarting the export or import.
<restart_spec> ::= RESTART <package_guid>
<package_guid> ::= <unsigned_integer>
ID that is created by Loader for every command at runtime
The package_guid is an integer, always exactly 24 bytes in length.
See the SQL Reference Manual, Unsigned Integer (unsigned_integer)
The package_guid and the computer name of the client of the Loader are entered in the table SYSLOADER.TRANSFORMATIONMODEL and logged in the log file.
The user can determine the package_guid of a command from the SYSLOADER.TRANSFORMATIONMODEL table or the log file. You can restart the command by executing this command with the syntax element RESTART <package_guid>.