Calchep3.6.23 and LHAPDF6.15: Problem with PDFs

At first screen of symbolic mode you should see
     Last correction March 14. ( line 22, file c_source/symb/lbl.c)
 If not, please, download the last improved version. We indeed had such bug.
If your version is the last one , please, let me know and I'll check it again.
Best
   Alexander Pukhov

Dear Alexander
Thank you for your answer.

Below is the line 22 from file lbl.c
goto_xy(15,Y+1); print("Version 3.6.23: Last correction March 14, 2015");

Regards
Fernando

Thank you for confirmation.
Unfortunately I don't see this bug on my CentOS Linux.
I'll re-read code carefully to see what could be a reason.

If in results/session.dat you have

LHA:MSTW2008lo90cl:0:0

then indeed proton/antiProton switch will not work because the last number has to be 1 or -1.
The proton/antiProton switch changes its sign.

I guess that everything will work properly when you remove files results/session.dat and results/aux/session.dat and start new session.
   Indeed there is bug in the code which allows to set this zero. It appears when one press the Esc key in menu on LHA sets.
To remove this bug just delete the line 250 in
   c_source/num/strfun/sf_lha.c

sgn[i1]=0;

and recompile CaclHEP by "make". n_calchep should be recompiled as well.

For batch mode I still don't see a problem.

Thanks a lot for bug information.
    Alexander Pukhov

Dear Alexander,
When setting
sgn[i1]=0; or sgn[i1]=1; in file c_source/num/strfun/sf_lha.c
it is working fine in interactive mode.

I still have problem in batch mode.
I am using the calchep example batch_file changing only the lines:
S.F.1: MSTW2008nlo90cl:0:1
S.F.1: MSTW2008nlo90cl:0:1

In batch mode the session. dat appears the following first lines:
#Subprocess 1 ( u, D -> W+, b, B )
#Session_number 1
#Initial_state inP1=4.000000E+03 inP2=4.000000E+03
 Polarizations= { 0.000000E+00 0.000000E+00 }
  StrFun1="LHA:MSTW2008nlo90cl:0:1"
  StrFun2="LHA:MSTW2008nlo90cl:0:1"

Then there are many
ERROR in strfun
messages
Thanks
Fernando

I have launched it several times and in my computer it works fine.
Have you

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$<path to your lhapdf>

instruction in calchep_batch ?

Best
   Alexander Pukhov

CORRECTIONof my last message
Dear Alexander,
When deleting line 250 sgn[i1]=0;
or
setting sgn[i1]=1; in file c_source/num/strfun/sf_lha.c
it is working fine in interactive mode.

I still have problem in batch mode.
I am using the calchep example batch_file changing only the lines:
S.F.1: MSTW2008nlo90cl:0:1
S.F.1: MSTW2008nlo90cl:0:1

In batch mode the session. dat appears the following first lines:
#Subprocess 1 ( u, D -> W+, b, B )
#Session_number 1
#Initial_state inP1=4.000000E+03 inP2=4.000000E+03
 Polarizations= { 0.000000E+00 0.000000E+00 }
  StrFun1="LHA:MSTW2008nlo90cl:0:1"
  StrFun2="LHA:MSTW2008nlo90cl:0:1"

Then there are many
ERROR in strfun
messages
Thanks
Fernan

Dear Alexander,
It is working fine in both ways:
Interactive and batch modes.
Thank you very much for your support.
Fernando