Error
Error Code: ORA-28521

Oracle ORA-28521: Heterogeneous Info Missing

📦 Oracle Database
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Description

The ORA-28521 error indicates that Oracle Database cannot find the necessary capability information for a connected non-Oracle system. This usually happens when automatic self-registration is disabled and the data dictionary hasn't been updated with the external system's details.
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Error Message

ORA-28521: no heterogeneous capability information available
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Known Causes

3 known causes
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Missing Capability Definitions
The Oracle data dictionary lacks the definitions required for the connected non-Oracle system.
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Automatic Registration Disabled
The `HS_AUTO_REGISTER` initialization parameter is set to FALSE, preventing automatic updates to the data dictionary.
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Incorrect Agent Configuration
The Heterogeneous Services agent for the non-Oracle system may not be properly configured or installed.
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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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