Hello @Momo1 -
Where are the NoData pixels? If they’re in streams, this is normal for the model - see the Defined Area of Outputs section of the User Guide for more information. There are also several threads on this forum discussing NoData areas in NDR, which you can find by using the Search feature. If none of these answer your question, please let us know what you tried and we’ll be happy to help further.
~ Stacie