While processing a PUT or MPUT command for one or more load modules, the server failed to reload the load modules from the temporary data set into the load library. 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 in the load library to receive the load modules. Look for console messages from file system or the IEBCOPY utility. Get a server trace of the operation.