When an instance is configured, by default, the TNS_Admin directory is created in the Oracle HOME\network\admin path. Use the following steps to change the path for the TNS_ADMIN directory:
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From the CommCell Browser, navigate to Client Computers > RAC Client.
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Right-click the instance, and then click Properties.
The Instance Properties dialog box appears.
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On the Details tab, select the Oracle RAC database instance, and then click Modify.
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In the TNS_ADMIN folder box, type the location for the TNS Admin directory.
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Click OK.
