Suddelny, base solve function does not work on RStudio

I am happy to join this community as a R & RStudio user.
Currently I am using the following R & RStudion tools respectively:
R version 3.2.5 (2016-04-14) -- "Very, Very Secure Dishes"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)

** RStudio: Version 0.99.903 – © 2009-2016 RStudio, Inc.**

Today I have a very strange problem with "solve()" function while computing inverse of Hessian matrix as follows:

           [,1]       [,2]      [,3]       [,4]
[1,]  244.17575  335.66923  39.06532  2059.5617
[2,]  335.66923  493.16159  49.87913  2864.6609
[3,]   39.06532   49.87913   6.88191   322.6178
[4,] 2059.56169 2864.66086 322.61783 23293.0391


Suddenly, solve function does not work on my RStudion.

I check this situation even when I try to compute the following easy computations:

[1] 3
> sqrt(4)
[1] 2


Someone could help me about this strange situation? Maybe I should change into new Rstudio version?

Best regards,

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Have you tried new version of r studio and updated r version.

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Hi! Welcome to Rstudio Community!

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My guess is you have some package loaded that is overriding the definition of solve(). Please try typing print(solve) in the console and see what you get. You should get something like below. If you don't then perhaps a restart of the session may clear the issue (though that is assuming you don't have anything in the session that isn't easy to re-build).

> print(solve)
function (a, b, ...) 
<bytecode: 0x10b1f1a70>
<environment: namespace:base>
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