How to run the tutorials

froosher · February 11, 2013, 10:46pm

I 'm totally new to root and have problem even running some basic scripts, I think I might have set up root improperly causing me these errors. But then again I’m not sure.

When I try to run;

TF1 f1(“func1”,“sin(x)”,0,10)
f1.draw()

I receive
Error: Can’t call TF1::draw() in current scope (tmpfile):1:
Possible candidates are…
(in TF1)
(in TFormula)
*** Interpreter error recovered ***
I’ve already read all the setup guides on the website, and still can’t understand what I’m doing wrong.

Wile_E_Coyote · February 11, 2013, 11:12pm

All C/C++ identifiers are case sensitive … “draw” is not the same as “Draw”.

See:
ROOT User’s Guide - Chapter 6. A Little C++
ROOT User’s Guide - Chapter 7. CINT the C++ Interpreter

froosher · February 11, 2013, 11:57pm

I’m typing these lines in the bash, named root.exe,

TF1 f1(“func1”,“sin(x)”,0,10)
f1.Draw()

and I get this error.

Error in TGHScrollBar::TGHScrollBar: arrow_.xpm not found
Error in TGVScrollBar::TGVScrollBar: arrow_.xpm not found

*** Break *** bus error

Wile_E_Coyote · February 12, 2013, 12:10am

Did you run (in the “xterm” in which you plan to run “root”, but before you actually run “root”):
[bash]$ source /path/to/your/ROOT/installation/bin/thisroot.sh
[csh]$ source /path/to/your/ROOT/installation/bin/thisroot.csh

froosher · February 12, 2013, 12:26am

this is what I get

root [63] /Users/appleapple/root/bin/thisroot.sh
Syntax Error: /Users/appleapple/root/bin/thisroot.sh (tmpfile):1:
*** Interpreter error recovered ***
root [64]

Wile_E_Coyote · February 12, 2013, 12:51am

You need to execute the command that I’ve shown BEFORE you run “root”.

froosher · February 12, 2013, 1:30am

I am getting “command not found”,

and these;
TF1 f1(“func1”,“sin(x)”,0,10)
f1.Draw()

still cause a crash

Wile_E_Coyote · February 12, 2013, 7:37am

What command (you should have got the name if the missing command)?

couet · February 12, 2013, 7:45am

This seems to be an endless thread. Please send a screen dump of your xterm (terminal) session, so we can see what you are really doing.

bellenot · February 12, 2013, 8:26am

Or try /Users/appleapple/root/bin/thisroot.csh (if you are using csh or tcsh)

Wile_E_Coyote · February 12, 2013, 8:27am

You missed “source” in the beginning

bellenot · February 12, 2013, 8:32am

Ooops! You’re right. So try:

This (with sh or bash):

. /Users/appleapple/root/bin/thisroot.shNote the . (dot) at the beginning

Or this (with csh or tcsh):

Cheers, Bertrand.

froosher · February 12, 2013, 9:20pm

So I ran this code, . /Users/appleapple/root/bin/thisroot.sh

and this is the screenshot of the error.

http://imgur.com/ZqSr0nw,DcvR9eI#1
http://imgur.com/ZqSr0nw,DcvR9eI#0

I’m not sure if this code means the same as the other one I tried but here is another screenshot
http://i.imgur.com/07zNEuV.png
Thanks for all the help

Wile_E_Coyote · February 12, 2013, 9:25pm

In the first screenshot, I do NOT see that you run “source /…/bin/thisroot.[c]sh” BEFORE you run “root”.

froosher · February 12, 2013, 9:35pm

I thought I was supposed to run . /Users/appleapple/root/bin/thisroot.sh on the bash, first screenshot is the root.exe terminal.

when i run . /Users/appleapple/root/bin/thisroot.sh on the root.exe, it returns unknown interpreter command

Wile_E_Coyote · February 12, 2013, 9:41pm

The first three lines of your terminal screenshot should look like:
Last login: … on ttys…
Anl-MacBook-Pro:~ appleapple$ source /Users/appleapple/root/ROOTSYS/bin/thisroot.sh
Anl-MacBook-Pro:~ appleapple$ root

froosher · February 12, 2013, 9:54pm

Another screenshot of the same error. Could I have missed a step while setting up root that is causing this problem?

Wile_E_Coyote · February 12, 2013, 10:03pm

It seems to me that you did not compile ROOT yourself, but you took ROOT binaries from somewhere and these binaries were created on a system which is “newer” than yours. Either you compile ROOT yourself on your system, or you need to “upgrade” your system (the first “offending” system library, visible in your screenshot, is the “/usr/X11/lib/libpng12.0.dylib” -> you need a newer version of it).

froosher · February 12, 2013, 10:55pm

cd root ./configure make

this is what i did which is on the website http://root.cern.ch/drupal/content/installing-root-source,
isn’t this what I was supposed to follow,

I have updated x11, I will keep updated

Wile_E_Coyote · February 12, 2013, 11:04pm

This is weird then.
Maybe you should report the exact version of your operating system, compiler, … (Xcode? X11User? XQuartz?)

Try (inspect absolute paths of all libraries reported by “ldd”):
root-config --bindir
ldd root-config --bindir/root
ldd root-config --bindir/root.exe
root-config --libdir
ldd root-config --libdir/libTree.so
root-config --etcdir

BTW. There’s one thing I don’t understand. If you built your ROOT as you show in your last post, how come it resides in “/Users/appleapple/root/ROOTSYS/[bin|lib]”? It should be in “/Users/appleapple/root/[bin|lib]” (no “/ROOTSYS/” in the middle).