Hello Leo,
With number range A-ZZZZZ you can create alphabets only and can use numeric only...
If you want to create alpha numeric number range then assign for ex: A10000- A99999 WITH EXTERNAL TICK..Or as per business requirement you have to set number ranges... Whether the numeric should be prefixed or alphabet should be prefixed... Or depends upon the material type for ex: the material type HALB should start with' S''. If there is no such requirement from the user then randonmly assign
number range in MMNR. From 1-Z....
Also, in OMS2 you can tick 'Extrnal assignment check'.
Hope this is clear to you..
Try this....
Regards,
Priti.