GDDMXD usage notes

When you use the TSO Session Manager with GDDMXD, enter a null line in the host session window after the GDDMXD graphics window disappears. This updates and activates the host session window.
When you run PL/I GDDM® applications, do not let the ISASIZE run-time option default to 0. This causes excessive allocation of storage below the 16 megabyte line, and causes a variety of storage allocation abends. Enter a run-time option for ISASIZE, such as ISASIZE(20K), to prevent storage allocation abends.
Although GDDMXD provides its own device information to the GDDM application, normal GDDM device initialization occurs. A full-screen 3270 TSO session from a real or emulated 3270 terminal with 80 columns and 32 rows is required to invoke the GDDM application.