OPatch failed with error code = 74 on windows



ERROR
Following files are active :
E:\Oracle\product\10.2.0\client_1\bin\oci.dll
ApplySession failed during prerequisite checks: Prerequisite check "CheckActiveFilesAndExecutables" failed.
System intact, OPatch will not attempt to restore the system

OPatch failed with error code = 74


SOLUTION
Change file \Oracle\product\10.2.0\client_1\bin\oci.dll to oci-1.dll (As you like)

Now execute OPatch. Issue resolved.

Big thanks to this blog author

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