OSP5000 program select method setting

Hi everyone!
So, a machine here is MC-4VA, system OSP5000M-G. Trying to load a program slightly bigger in size than buffer allows, and I got on screen this message: 2530 Program buffer owerflow ERROR 1. As far as I know there are different methods on how system read/load files -A, B, S, M. On AUTO mode screen, at the bottom there is a text: A-Mtd, so the system loads program directly to the buffer. What I have tried there is changing NC optional parameter (No.11) to 1 (setting for B-method), wait for 4min, switched off, wait for another 4min, switch system on. Still there is the same A-Mtd on AUTO screen, absolutely no change. Even if I try to enter for example PS TEST.MIN;B what I get is message 2156 option ERROR 'B' . I have done this both from BB1 and BB0 memory cards- all the same, only A-Mtd on screen. What is wrong there?

Guntis

Check your management data card. I think you don't have B method program select option. This is specific(optional) function.
If you want it, please PM me.