FTP is being mean to me!!

I have a job that does the following:

-starts up in the PUB group of account X (acct no important)

- does a CHROUP in group A
- runs FTP.ARPA.SYS
- opens a remote system (running Linux)
- logs on as a specific user (passworded)
- issues the FTP PROMPT command
- issues the FTP MPUT * command
- closes the remote session
- exits FTP
- does a CHGROUP to group B
- runs FTP.ARPA.SYS

... and the process proceeds through 126 different groups with corresponding users on the Linux system

My problem is this...

Somewhere down the line, during one of the transfers in one of the later groups (about 100 in),

I get a msg saying "REMOTE ABORTED THE CONNECTION (SOCKERR 64)
followed by
"426 Data Connection: No space left on device"
followed by
"SUCCESSFUL COMPLETION (SOCKERR 0)"
followed by another successful file transfer
followed by 
"452 Error writing file: No space left on device"
followed by
"SUCCESSFUL COMPLETION (SOCKERR 0)"

then...
no close or exit appears on the STDLIST and it goes straight to the next CHGROUP

and the subsequent CHGROUPs and transfers have the same errors, which always include some successful PUTs and some failures.

Before you ask, there is over a Gig of free space on this Linux machine.

I suspect the "no space" message is really not the case, I think it is more an issue of a disconnect.

The loss of the 'close' and 'exit' commands on the STDLIST confuses me more.

Any enlightenment?

Steve Hammond