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I just installed the mapping toolbox In running the example referenceSphere can not resolve superclass map.geodesy.Sphere.

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I get the following error running the example code:
>> worldmap world
Error using referenceSphere
The specified superclass 'map.geodesy.Sphere' contains a parse error, cannot be found on MATLAB's search path, or
is shadowed by another file with the same name.
Error in regionmap (line 51)
e = referenceSphere('earth','meters');
Error in worldmap (line 122)
ax = regionmap(mfilename, varargin);
MATLAB Version: 9.8.0.1323502 (R2020a)
MATLAB License Number: 874794
Operating System: Microsoft Windows 10 Enterprise Version 10.0 (Build 19042)
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
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MATLAB Version 9.8 (R2020a)
Antenna Toolbox Version 4.2 (R2020a)
Mapping Toolbox Version 4.10 (R2020a)
Signal Processing Toolbox Version 8.4 (R2020a)
  2 Comments
Paul Martellock
Paul Martellock on 30 Jul 2021
>> which -all worldmap
which -all regionmap
which -all referenceSphere
which -all map.geodesy.Sphere
C:\Program Files\MATLAB\R2020a\toolbox\map\mapdisp\worldmap.m
C:\Program Files\MATLAB\R2020a\toolbox\map\mapdisp\private\regionmap.m % Private to mapdisp
C:\Program Files\MATLAB\R2020a\toolbox\map\mapgeodesy\referenceSphere.m % referenceSphere constructor
'map.geodesy.Sphere' not found.

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Accepted Answer

Kojiro Saito
Kojiro Saito on 5 Aug 2021
In R2020a,
which -all map.geodesy.Sphere
will return the following file.
MATLAB_INSTALL\toolbox\shared\mapgeodesy\+map\+geodesy\Sphere.m % map.geodesy.Sphere constructor
toolbox\shared\mapgeodesy folder is created when Mapping Toolbox is installed.
Please confirm toolbox\shared\mapgeodesy\+map\+geodesy\Sphere.m does exist, if it exists, it seems the foloder was removed fomr MATLAB search paht.
So, you will need to do addpath
addpath('C:\Program Files\MATLAB\R2020a\toolbox\shared\mapgeodesy')
savepath
Or reset MATLAB search path to the initial conditions.
restoredefaultpath
If toolbox\shared\mapgeodesy folder does not exist, there might something wrong in your installation. So you need to install Mapping Toolbox again.

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