COUPLE module won't work

[jdetroullioud]

Dear Scale Users,


I am trying to couple OpenMC (Monte Carlo transport code) with ORIGEN-S. The idea is that OpenMC provides the neutron flux spectrum to COUPLE which, in turns, collapses the multi-group cross sections into one group cross section for ORIGEN-S.

However, it looks like I have a problem with running COUPLE. When I run the COUPLE's FIDO file "testcouple.inp" for example, I have the following error message in "testcouple.out" on the last line of the file :
"error   need ampx lib on unit=ld. or give user flux on 9** array
 stop code        100"

Now, I also copy-pasted the exact same script as in the example of SCALE6.1 manual in the F.6.5. EXAMPLE CASES section, Case 2 (page 1273) and tried to run it: I have the exact same error. I did run the sample problem for COUPLE to check if it was a problem with the module itself but there are no problems.

It might be a stupid mistake from my part though but according to my understanding of COUPLE I have the possibility to only provide a flux spectrum and telling COUPLE to use one of the AMPX neutron activation cross-sections library and compute the weighted one group cross section. It is at least what I think I am doing in my script.

I attached the input file for COUPLE that is a copy paste of SCALE6.1 manual page 1273 script mentioned above and the .out I obtain.


Thanks for you help!


Julien