I am not able to use the ras mapper in hecras 5.0.3 then i tried to export model from civil 3d to hecras, I used *.tif format and converted into *.flt format but when i tried to insert the terrain from those exported formated i couldn’t make terrain at the ras mapper it says error which I attached in this message..
why did you convert it to flt? HEC-RAS is just going to convert it back to *.tif. Try the *.tif and see if that works. As for the errors, I could not read them.