Unable to read data from the transport connection

Question

Hi,

Sometimes I get this error (Unable to read data from the transport connection) which gets resolved automatically. Is this error happen becasue we send the files back to back? Please let me know.

Also want to know about one more error: Data set XXXX.XXXXX.XXXXXX.XXXXXXXXXX.XXXXXXXX located to another job and is unavailable for STOR command. (code=450)

The above dataset was once sent at 15:04:14 and then again sent at 16:31:02 and then again at 16:32:09. It was successfully FTPed for the 1st and last case where as it gave the error while trying at 16:31:02.

Can someone please let me know why these above two errors occur?

Thanks........

Lita

Answer 1

The first error is because too many files are being transferred quickly in succession - each transfer consumes a file descriptor on the client, and it takes a minute or so to free them up. Eventually they get freed up.

The second error probably means you are trying to overwrite (i.e. delete) a file that has been allocated to another job or user.

Answer 2

Thanks Bruce. But the dataset was in a format due to which it creates diffirent versions of the file automatically (Exa: abc.def.ghi.kkkk(+1)). So, it should never be overwritten.

Any further help will be highly appreciated.

Answer 3

Sorry, I don't know much about IBM mainframes (?). But this is an error being reported from the server, so there is some kind of problem there - you will perhaps need to look at the server logs.

Answer 4

No problem Bruce. Thanks for your support.

We found the cause:

This error occurred when the file was being downloaded. The first download failed, but did leave a file in the server. Subsequent attempts to download the file to the server resulted in blocking the FTP Service from accessing the file.