Hello @CarissaW_GCS 

I have a bug on my application that I can't seem to understand. 

I am looping on an embedded Page Group of my parent case. For each page of this list, I am calling pxAddChildWork on child cases to create new WOs. The start of these cases are then trigerring a save on my top case so that a declare index is called and sometimes I get : 

"An unexpected issue occurred while processing the declare index - DPSCedreID on class ... " 

And later I have many errors : 

The page or property pyWorkPage.STParc.STList(1).ResourceList(1).pzIndexes(DPSCedreID) is in read only mode and can't be modified . Calling method  : com.pega.pegarules.data.internal.clipboard.ClipboardPropertyImpl.setValueOverride(Object)  Détails : (none)"

What could have happened ? Where should I look ? 

Most of the times, there are no problems but for one page in the list there is and then everything is broken... Ref Link : https://support.pega.com/question/problem-pzindexes 

Thanks in advance, G Subbarao.