https://community.esri.com/t5/data-management-questions/mosaic-to-new-raster-error/m-p/1166677#M43990 <P>I have about 150-160 DEM images I want to combine into 1 new raster. I keep getting Error 999999, I have 32 bit float selected. I am using Arc Pro 2.8.1. I don't even know if this is enough information to help.</P> Thu, 21 Apr 2022 16:11:04 GMT RyanPenta 2022-04-21T16:11:04Z https://community.esri.com/t5/data-management-questions/mosaic-to-new-raster-error/m-p/1166677#M43990 <P>I have about 150-160 DEM images I want to combine into 1 new raster. I keep getting Error 999999, I have 32 bit float selected. I am using Arc Pro 2.8.1. I don't even know if this is enough information to help.</P> Thu, 21 Apr 2022 16:11:04 GMT https://community.esri.com/t5/data-management-questions/mosaic-to-new-raster-error/m-p/1166677#M43990 RyanPenta 2022-04-21T16:11:04Z https://community.esri.com/t5/data-management-questions/mosaic-to-new-raster-error/m-p/1166757#M43991 <P>Are they all 32 bit floats?</P><P>try 2 ... do you get the same error?&nbsp; Add some more.&nbsp; You may be running out of memory</P><P>maybe try this instead ...&nbsp;<A href="https://pro.arcgis.com/en/pro-app/latest/help/data/imagery/mosaic-datasets.htm" target="_blank">Mosaic datasets—ArcGIS Pro | Documentation</A></P> Thu, 21 Apr 2022 18:05:16 GMT https://community.esri.com/t5/data-management-questions/mosaic-to-new-raster-error/m-p/1166757#M43991 DanPatterson 2022-04-21T18:05:16Z