Maxdata
Set Maxdata nnnn
(Initially: no stack expansion)
When Qedit 
reps a compatibility-mode program, it uses the current Set Maxdata value (if any) for the Maxdata= parameter. Without Maxdata, a program may abort with stack overflow. Programs need large Maxdata when they do sorts, call V/PLUS, or have large data divisions in their DYNAMIC subprograms. You can still override the default value for Maxdata on any rep command. Set Maxdata does not apply to the :Run command.