Hi, The source port of an XProc pipeline is connected to a file on the file system: <p:input port="source"> <p:document href="input.xml"/> </p:input> I run the pipeline with the built-in scenario "Self XProc, no input no output". If I modify input.xml and run the piepline again, the changes are not picked up. A feature of Calabash is to cache all inputs in memory (I think). So I guess the same processor is kept in memory by oXygen, but I think oXygen should empty the Calabash's cache between two runs of the pipeline (or get rid of the processor and instantiate it again if this is not possible). Besides, this pipeline loops over a lot of files, so that means they are kept in memory "for ever" (as long as oXygen itself is alive). Regards, -- Florent Georges http://fgeorges.org/