Hi,

I write a package in Linux and ready to distribute, and I can install it in
linux and run it.
However, when I have install it in my Windows' R.

I can not 'require' it.

> is.element("grt", installed.packages()[,1])
[1] TRUE
> require(grt)
Loading required package: grt
Failed with error:  ‘'grt' is not a valid installed package’

Is there any pitfall between platforms?
And anywhere I could check more detailed error message.

best,
Liping Liu, who sincerely thinks R is not google friendly, since "R" is a
awful keyword.

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