Help~open hub destination file is not open error!

Hi all,

I met a problem, i tried several times and all got error messages.

It is about open hub destination, i want to use it to send some files to sever, but when i execute the DTP, i got system dump:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Runtime Errors DATASET_NOT_OPEN

Except. CX_SY_FILE_OPEN_MODE

Date and Time 26.10.2011 01:18:09

Short text

File "I:\usr\sap\Q26\DVEBMGS11\work\ZSS_O0021.CSV" is not open.

What happened?

Error in the ABAP Application Program

The current ABAP program "CL_RSB_FILE_APPLSRV===========CP" had to

terminated because it has

come across a statement that unfortunately cannot be executed.

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I have two open hub, one is fine ,but the rest one always get this error. Help..........