IRAS B can only edit binary raster files (color mode = monochrome or 2 colors). If such rasters are attached to the DGN that is opened in IRAS B, they are compatible and should be loaded in IRAS B. If the rasters that were attached from Descartes/Raster Manager are greyscale or color rasters, then they are not compatible with IRAS B and they won't be loaded. HTH, Pascal
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