[duccnc]

Thought it ask me to switch it to on position after hitting number key (1-6). And i tried also with param. switch in disable position.

Now I have tried all combination (Param switch enable/disable, BMU switch on/off) and every time i get only three choices.

What next?

Vekku

After you initialize bubble memory ,you must depress key 4(bubble )to enter the screen:
Bubble initialize
*function key
1:write by tape
2:write by manual
3:display loop data
origine :return to IL mode
you must press key 2 (after switch BMU SW to ON)to input the defect loop to enter the defect loop data as Dan Fritz quote.