patch 10281212 R12.HR_PF.B.delta.4 fails relinking on windows

Hi,
patch 10281212 R12.HR_PF.B.delta.4 fails relinking on windows

Patch log file is showing
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Relinking executables...


An error occurred while relinking application programs.
Continue as if it were successful [No] : No
Freeing includes hash table
Freeing fixes hash table
Freeing basedons hash table
Freeing entities hash table

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Fomr the adrelink.log file :
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Error executing cp -pf E:/MIG/apps/apps_st/appl/au/12.0.0/bin/fnd*.dll E:/MIG/apps/apps_st/appl/fnd/12.0.0/bin
Please make sure file isn't being used.

Copy DLLs of GL to E:/MIG/apps/apps_st/appl/gl/12.0.0/bin