Recently I got a question on an error message in an SXS: „The system repeatedly accesses parameter XXX in change mode“ (Message number CMX_PII006). After I analyzed it I came across a mis-use of parameter categories.

The parameters in question were meant as parameters for input fields and therefore they were set to category „Input“. The real use however for these categories is to specify the flow of parameters between different XSteps using the reference valuation (Please refer to the SAP documentation on XStep parameters for more details). So if you intend to use your parameters just inside one XStep leave the category to the standard value which is „Local“.