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When you XOG in Allocations for a project team, allocations from earlier periods are wiped out


Article ID: 36514


Updated On:


Clarity PPM On Premise


Allocations can be lost when XOG write is performed to update some allocation segments (not all) for a resource.

Steps to Reproduce:

  1. Add a resource to a project team with one year duration, say from January to December 
  2. Set Work Effort = % Availability
  3. Set %Default Allocation to 0%  
  4. XOG in 30% allocation data for April; XOG is successful and data is correct  
  5. XOG in 40% allocation data for the month of July and August Only; do not include April
Expected Result: July and August data get updated with 40% and April allocation data is intact
Actual Result: July and August data get updated with 40% but April allocation data has been deleted



Release: All Supported Releases
Component: Clarity PPM XOG


  • This is working as designed.
  • XOG update of allocation cannot be partial, all allocation segments must be present in the write file. 


Best practice which will prevent this issue:
  1. Perform a XOG read first and update the file with any needed change
  2. Then use the same file to XOG write back to Clarity PPM.
  3. This will prevent data loss or corruption. 

Additional Information

See 141061 - How to search for known Clarity PPM Issues using Self Service