While processing a GET or MGET command for one or more load modules, the server failed to unload the load modules into a temporary data set. The transfer is ended, and no files will be transferred.
FTP waits for the next command.
Contact your system programmer.
Verify sufficient free space exists on the file system to receive the temporary data set. Look for console messages from file system or the IEBCOPY utility. Get a server trace of the operation.