[admin@MikroTik] > routing ospf network
bad command name network (line 1 column 14)
Correct; the routing configuration is significantly different in v7.x.x. You might want to inspect the new wiki for both OSPF specifically [1] and the general changes to the :routing configuration tree [2] before continuing.
In the case of :routing ospf network, what you’re probably looking for is under :routing ospf interface-template network= now. Note also that, if you prefer, you are no longer required to associate interfaces with areas via a matching prefix and can instead do it by naming the interfaces directly.
[1] https://help.mikrotik.com/docs/pages/viewpage.action?pageId=328218
[2] https://help.mikrotik.com/docs/display/ROS/ROSv7+Basic+Routing+Examples