When I tried to create a User Space, through a CL Program , just by giving a call to the API QUSCRTUS, I am not able to control the size of the User Space. The IBM API reference manual says that the Length parameter should be BINARY(4). In CL, how should we tackle this situation?. I also tried to make an RPG/400 program to do the same task which also went in vein. Can any body please expalin me how to declare this length parameter and how can we create one with length I specify... thanks in advance..