Jorge Garcia wrote:
¿It is possble that other program or tcode can do changes in MMNR without having tracing in log?
¿it is possible to do changes directly in MMNR without tracing logs?
No. As of my knowledge, both are not possible in standard SAP system.
15 days ago, your system was working perfect, suddenly system is behaving different.
Is there any material created for the material type from last year ?
Check is there any development which is causes for the changes behavior.