# What do I do if an error or other issue occurs during installation?

You must address any errors that occur during installation before attempting to transfer data. Typically, you address errors by changing the value of one or more properties, dropping the destination account, and rerunning the install_etl.sql script.

Common installation issues

Issue | Resolution
--- | ---
The error ORA-39002: invalid operation occurred with one or both of the following errors: ORA-39070: unable to open the log file ORA-39087: directory name <DirectoryName> is invalid error | Make sure that: The specified directory in the database points to an existing and accessible location. The import_directory parameter is specified correctly. Make any necessary changes. For more information, see Editing the etl.properties file and installing the ETL utility again.
You are importing using a database link, and the console output or the installation log file says: *** Skipping Database link creation *** | Check that the source_connect property in the etl.properties file has a valid value. To check the values of the properties in the file, run the following command in SQL*Plus: select name, value from <dest_account>.etl_properties If the property does not have a valid value, correct the value. For more information, see Editing the etl.properties file and installing the ETL utility again.
The console output or the installation log file says: Database Link <LinkName> is unusable | Possible causes: You provided the wrong passwords for the import accounts. You entered an invalid value in the source_connect property in the properties file. The source_connect value you put in the properties file doesn’t exist in your tnsnames.ora file. Install the ETL utility again with the correct values. For more information, see Editing the etl.properties file and installing the ETL utility again.
You are importing using a file import, but the installation attempts to import using a database link. | Make sure that the value of the source_connect property is blank value (two single quotation marks with no space between them: ''). Additionally, make sure you specified values for the import_directory and import files when you exported source data and made the files accessible.

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