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Unable to save declare expression for data page of type list



Unable to save a declare expression when a data page of type List is referenced for the Sum aggregate option in the Declare Expression rule.

Error Messages

Invalid expression or reference: error Final expression D_myDataPage.pxResults().Price (integer/double) can't be converted into the desired type (ClipboardProperty Collection)

Steps to Reproduce

  1. Create a data page of type List. Ensure the data page results have either an integer or a decimal property (D_myDataPage.pxResults(1).Price).
  2. Create a declare expression on the GrandPrice of equivalent type [Integer or Decimal] property.
  3. Use the Sum Of method in the declare expression to aggregate the Price value in the pxResults.Set GrandPrice = Sum Of D_myDataPage.pxResults().Price
  4. Save the rule.

Root Cause

A defect in Pegasystems’ code or rules 


Apply HFix-55695.

Published August 15, 2019 - Updated October 8, 2020

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