Sometimes the link between SAP XI and the target system (say ERP) goes down and messages fail on the outbound side. It may not be possible to restart them from using RWB or the transactions like SXI_MONITOR/SXMB_MONI. This article explains how to deal with such messages.
SAP PI
XI/PI: Introduction to Context Handling in Message Mapping
Context handling is an important technique to map complex scenarios in XI. This article introduces the basics of context handling using a simple example.