Error
Error Code: ORA-28520

Oracle ORA-28520: Heterogeneous Dictionary Error

📦 Oracle Database
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Description

The ORA-28520 error indicates a problem with the Heterogeneous Services data dictionary translations. This typically occurs when Oracle cannot retrieve data dictionary information from a non-Oracle system, hindering communication between the databases.
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Error Message

ORA-28520: error initializing heterogeneous data dictionary translations
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Known Causes

4 known causes
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Missing Dictionary Table
The required Heterogeneous Services data dictionary table is missing from the Oracle server.
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Incorrect Table Structure
The underlying data dictionary table is incorrectly formed or corrupted, preventing Oracle from reading it.
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Unexecuted Installation Script
The custom installation script for the connected agent (identified by FDS_CLASS_NAME) was not executed.
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Incorrect Agent Configuration
The agent is not configured correctly for the specific version of the non-Oracle database system, leading to translation errors.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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