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Support Article

Error occurs when creating work object from Pega Web Mashup



Error occurs when creating a work object from the Pega Web Mashup portal. Additionally, the below out-of-the-box properties have empty values in the Clipboard and database,
  • pxCreateDateTIme
  • PXCreateOpName
  • pyStatusWork

Error Messages

pxHTTPErrorMsg Failed to load XML from http post data...
pxHTTPExceptionMsg InvalidStream, StorageStream) sax parse error: Content is not allowed in prolog.

Exception in PegaRULES log file: InvalidStream, StorageStream) sax parse error: Content is not allowed in prolog.
at ~[prprivate.jar:?]
at ~[prprivate.jar:?]
at ~[prprivate.jar:?]
at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.mapInputData( ~[prprivate.jar:?]
at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.activityExecutionProlog( ~[prenginext.jar:?]
at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner( ~[prenginext.jar:?]
at sun.reflect.GeneratedMethodAccessor124.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke( ~[?:1.8.0_171]
at java.lang.reflect.Method.invoke( ~[?:1.8.0_171]
at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock( ~[prprivate.jar:?]
at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked( ~[prprivate.jar:?]
at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked( ~[prprivate.jar:?]
at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest( ~[prenginext.jar:?]

Steps to Reproduce

Access the application in Pega Web Mashup.

Root Cause

A software use or operation error.


  1. Apply HFix-60939.
  2. Add the below Script in the UserWorkForm.

    <script> pega.u.d.attachOnload(function() { pega.u.d.GET_REQUEST_DELETEDOCUMENT = true; }); </script>

Published April 16, 2020 - Updated October 8, 2020

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