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The client version is rolled back by recreating the link to the old version.
https://jira.slac.stanford.edu/browse/SSC-232
Some of the client tools do not work on rhel5. The reason is that there is a mismatch between the bitness of the executable and the xrootd libraries. For example the perl version used is a 32-bit executable on all architectures but on rhel5 the 64bit xrootd libraries are loaded by perl which fails.
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