Help! Couldn't open units database??

[Min Min]

Hi,

I am learning Grads. And I installed an Win32e Grads in my PC. When I used
gradsdods to visit an url, it always returns such an error message
"udunits(3): Couldn't open units database
"/usr/local/lib/grads/udunits.dat": No such file or directory. UDUNITS
package initialization failure."  How to resolve it? Does it mean I must
install an udunit??
Thanks in advance!!

Best Regards,
Sincerely,

Min
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