Tracing wrappers activity Compiler and Framework wrappers (iscc and iscrun) allows you to trace their activity in order to show the environment that they’ve set up and the full java command that they are issuing. The trace is activated by setting the ISCC_DEBUG and ISCRUN_DEBUG environment variables to 1 before using the wrappers. The trace is printed on the standard error. Below are two examples. The following snippet shows how to compile the HELLO-WORLD.cbl sample program by tracing iscc activity on Windows: set ISCC_DEBUG=1 iscc HELLO-WORLD.cbl The following snippet shows how to run the HELLO-WORLD sample program by tracing iscrun activity on Linux: export ISCRUN_DEBUG=1 iscrun HELLO_WORLD