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Troubleshooting : Troubleshooting : Setup/Connection Issues : Troubleshooting the Issue

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Troubleshooting the Issue
Some common reasons that setup/connection issues occur are:
*On Windows, UNIX, and Linux, the library path environment variable is not set correctly.
*When setting the library path environment variable on HP-UX operating systems, specifying the parent directory is not required.
*You also must set the LD_PRELOAD environment variable to the fully qualified path of the[sl].
The library path environment variable is:
32-bit Drivers
*PATH on Windows
*LD_LIBRARY_PATH on Solaris, Linux and HP-UX Itanium
64-bit Drivers
*PATH on Windows
*LD_LIBRARY_PATH on Solaris, HP-UX Itanium, and Linux
*The database and/or listener are not started.
*The ODBCINI environment variable is not set correctly for the ODBC drivers on UNIX, Linux, or macOS.
*The ODBC driver’s connection attributes are not set correctly in the system information file on UNIX, Linux, and macOS. See "Data Source Configuration on UNIX/Linux" or "Data Source Configuration for macOS" for more information. For example, the host name or port number are not correctly configured. See "Connection Option Descriptions" for a list of connection string attributes that are required for each driver to connect properly to the underlying database.
See "The Test Loading Tool" for information about a helpful diagnostic tool.