I copied view v_t001b to my own version, zv_t001b and created a table maintenance for it.
All settings in the maintenace status are the same (Access: read, change, delete and insert; Delivery Class: C; Display/Maintenance allowed)
However: in our QA (and productive) systems, v_t001b is editable, zv_t001b is not (when maintained in sm30).
After debugging, the reason is the following:
OBJH-cursetting is set to X in v_t001b, space in zv_t001b.
I tried changing the Delivery Class from C to A but that doesn't help, I assume the delivery class is taken from the table (t001b) and not from the view in any case because this does not change the values in OBJH.
Any help would be appreciated.