‘TPythia8.h’ file not found

ROOT
1

I too am trying to run the pythia8.C macro. I installed ROOT before I installed PYTHIA8 on my computer. Should I uninstall and rebuild ROOT?
I have followed all the instructions given in various forums but the macro just does not run. keeps giving me the same error every time.

root/tutorials/pythia/pythia8.C:18:10: fatal error: ‘TPythia8.h’ file not found
#include “TPythia8.h”

Please Help!

2

@taherburhani You need to rebuild ROOT from scratch, if you get “no” from: root-config --has-pythia8

@Axel It seems that “root-config” got screwed in ROOT 6.26/04. Instead of “no”, it returns “--has-pythia8: unknown feature!”. Please fix it.

3

Yup confirmed. @bellenot is investigating!

4

(And @taherburhani I moved your post to a new topic: please don’t respond to old, inactive topics but create a new one. This makes it easier for us to track what we are talking about here.)

5

FYI, the problem was found and will be fixed soon

6

So this should be fixed now in the master and v6-26-00-patches branches

7

@Wile_E_Coyote thank you. I will try building it from scratch. But i am afraid that I might mess up my computer. Also, the command does return me --unknown feature.

8

We build ROOT from scratch all the time and our computers are doing great :slight_smile:

9

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