process model some referenced items could not be found

Certified Associate Developer

Hello Appian Community,

so I am trying to store all of the attachments for my process model,

union(pv!boipCDT.attachments,
      pv!boipCDT.fundingMgmt.approvedRequirementsDocuments,
      pv!boipCDT.trainingReq.sustainmentTrngDocuments,
      pv!boipCDT.trainingReq.NET_Documents)

this lets me store the attachments but nothing else.

Am I using union wrong?

thanks,

Kevin

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