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Hi for some time, Firstly, we've installed the latest development version of xrootd on 100 nodes (1 redirector + 1 supervisor + 98 dataservers) with the support of open load balancing and everything is working great and super. I would like to say, brilliant work. To my problem, I want to enable the MSS interface. We've implemented scripts for performing meta-data operations and staging files from HPSS. (directives oss.mssgwcmd, oss.stagecmd). I 've inserted everything in config file for dataserver and tried to obtain a file from HPSS. In redirector log I found this error message: 050712 19:35:48 18366 odc_Locate: starlib.10447:13@rcas6230 given error msg 'No servers are available to read the file.' by xrdstar path=/home/starreco/reco/productionHigh/FullField/P04ik/2004/040/st_physics_5040131_raw_2010003.MuDst.root and found out that scripts was not even called once time. (this I know from debug support of my script). My question is, if I have something wrong in my configuration file or I forgot something to add or I skiped something in reading of documentation. I am enclosing a configuration file for dataserver. Thank you for any advice Pavel