The "CRASTART" method starts the CARMA server as a subtask within RSE. It provides a very flexible setup by using a separate configuration file that defines data set allocations and program invocations needed to start a CARMA server. This method provides the best performance and uses the fewest resources, but requires that module CRASTART is located in LPA.

RSE invokes load module CRASTART, which uses the definitions in crastart*.conf to create a valid environment to execute batch TSO and ISPF commands. Developer for z/OS® uses this environment to run the CARMA server, CRASERV. Developer for z/OS provides multiple crastart*.conf files, each preconfigured for a specific RAM.