** exception caught during invocation of PRObjectWrapper.prRemove() for Java Property/Page List pyAttachments. Message: The page or property D_AttachmentList_pa503806596038531pz.pxResults is read-only, and cannot be modified. Calling method: com.pega.pegarules.data.internal.clipboard.ClipboardPropertyImpl.removeResultRow(int) Details: (none)
"D_AttachmentList" data page is in read only mode, so you are getting this error. If you are doing any modification to Read only Data Page source, you may get this error. Can you please elaborate your use case and send us the details about actions performed on the work object. According to your use case, you can change the Edit mode to "Editable" but before doing the change please send the use case details.