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Missing value after using "convert_mpas"


New member
Hi everyone,

I completed a regional MPAS simulation with 15-3km resolution recently. I successfully obtained a series of "main.****.nc" files. Now I use the convert_mpas tool to convert the output files to lat-lon format (

But when I used ncl to draw, I found that a part of the area was blank (the north side of the target area). As shown below left:
But when I use ncl to draw on the original main.****.nc file, the target area is complete. As shown below right:
I made sure my NCL scripts do not limit the lat or lon of the map.

I made sure to cover all target areas when using the convert_mpas tool. My target_domain file is:
startlat = -10.0
endlat = 90
startlon = 30.05
endlon = 180.05
nlat = 1000
nlon = 1500

Can anyone help me? I have no idea about the missing area in the (nc file generated by convert_mpas).