Problem with FullSimplification[]

[a.asghar...@gmail.com]

Dear Mitica,

I have a problem with Fullsimplifation[] in one case. I follow all the structure completely and my xAct folder is complete, yet this command does not run, giving me: "Message[RInv::nodatabase]".
I will send you my problem that I can not find its issue [1]. I also send you the pics of my xAct [2] and Riemann 2 []folders to say that there is no problem with my folders, at least I think so. I untarred both "Riemann_expand4order12.tar" as well as "Riemann.tar" in the direction mentioned. At the end I should say that FullSimplification works in other cases and I could not find where the problem is.

Could you please help me?

Best wishes.

Asghar

[a.asghar...@gmail.com]

Dear Mitica,

I think the attached shot might help with the problem I faced.

Best,

Asghar

[Mitica Isen]

Dear Asghar, 

I'm also new to xAct, so I'm afraid that I couldn't help you with your problem. In fact, when I tried to run your notebook file, I faced the same problem as you. You may ask others to see if there are any good solutions. 

P. S. Sorry for the late reply, I've been a little busy lately and didn't get to read your letter in time. 

Best wishes. 

Mitica

[Jose]

Hi,

What do you get if you evaluate this variable after loading the Invar package?

    xAct`Invar`$InvarDirectory

This should point to the directory where the Invar.m file and Riemann folder are. In my case for example I get this:

    In[17]:= xAct`Invar`$InvarDirectory
    Out[17]= "/Users/jose/Library/Mathematica/Applications/xAct//Invar"

I just run your example in my xAct installation and returns a result without error messages.

Is perhaps something encoded incorrectly under Windows? I wonder whether the double slash (which should not be there) is unacceptable under Windows...

Cheers,

Jose