problem when trying to upload a .dat file on SFTP server

I get this error message when trying to upload a .dat file to an SFTP server.
I'm using Accellion SFTP application and using a script
error message : Transfer was succesfully finished, but temporary transfer file "test.dat.filepart" could not be renamed to target file "test.dat". If the problem persists, you may turn off transfer resume support.
the command I'm using in the script is put -resume *.dat
this is an urgent issue, please help.
thanks

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