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Support Article

Nullpointer exception on page-remove for Page-List Property



User has one embedded class as page list page. One of the properties in this class has reference to another property in work page. Page list page is constructed in their flow. User is trying to delete/page-remove the pagelist page in one of the Post processing activity. System shows Nullpointer exception on the screen.

Error Messages

Flow Action pre-processing activity UpdateProduct failed: java.lang.NullPointerException"

Steps to Reproduce

1. Create the clipbaord structure as pyWorkPage.TempPage.tempList(1).TempProp [Refers to pyWorkPage.TempProperty]
2. Do a Page-Remove of ".TempPage"

Root Cause

The root cause of this problem is a defect in Pegasystems’ code/rules.


This issue is resolved by hotfix item HFix-10143

Published January 31, 2016 - Updated October 8, 2020

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