Troubleshooting "SpecHierarchy Object is Null" Error in DX Exports

Troubleshooting "SpecHierarchy Object is Null" Error in DX Exports

Overview

This article provides guidance on resolving the "SpecHierarchy Object is null" error encountered during DX exports from DNG (DOORS Next Generation). This issue occurs when the Spec Object is missing or incorrectly mapped, preventing successful data serialization.

1. Understanding the Error Message

Error Message:

yaml

CopyEdit

2024-12-12 | 15:20:35.848 | Thread-10 | INFO | c.j.d.r.ExchangeResult | ID: | success: false 2024-12-12 | 15:20:35.848 | Thread-10 | INFO | c.j.d.r.ExchangeResult | ID: | message: Error during EXPORT: SERIALIZATION phase. Spec Object not found, unable to export Spec Hierarchy.

What It Means:

• The SpecHierarchy Object (which defines the structure of requirements in DNG) is missing or improperly referenced.

• DX cannot serialize and export the hierarchy because the Spec Object does not exist in the expected location.

2. Possible Causes & Solutions

A. Missing or Corrupted SpecHierarchy Object in DNG

✔ Re-import the same data file into DNG with a clean structure.
✔ Perform a re-indexing operation in DNG to ensure all objects are properly linked.
✔ Check if the original requirements have been moved, renamed, or deleted.

B. Mapping Issues in the DX Export Process

✔ Review the mapping file to ensure correct linkage between DNG and DX.
✔ Ensure that all item types referenced in the export are supported by DX.
✔ Try creating a new mapping file and re-exporting the data.

C. Object Type Changes or Syncing Issues

✔ If items were modified in DNG, ensure that they retain the original item type.
✔ Use a script to map old item IDs to new ones and push updates.
✔ Test exporting a small subset of data first to isolate the problem.

3. Best Practices for Avoiding SpecHierarchy Errors

✅ Always validate the hierarchy before attempting a DX export.
✅ Use consistent item types when modifying and re-importing data.
✅ Perform a project cleanup and re-index in DNG if persistent errors occur.
✅ Keep backups of mapping files to track changes and prevent mismatches.

4. Conclusion

The "SpecHierarchy Object is null" error typically results from missing, incorrectly mapped, or modified objects in DNG. By ensuring correct hierarchy integrity, performing re-indexing, and validating mapping files, users can prevent export failures and maintain a structured data exchange process.

For additional assistance, consider reaching out to Jama Support or DNG Administrators for deep-dive troubleshooting.