New Pincell Depletion Error

[amasri]

Hello,

I tried running the pincell depletion example from another computer and rather than encountering the previous problem, I am now met by this in my command prompt

(openmc-env) amasri@amasri:~/depdep$ python run_depletion.py
Traceback (most recent call last):
File “/home/amasri/depdep/run_depletion.py”, line 15, in
op = openmc.deplete.Operator(model, chain_file)
File “/home/amasri/miniconda3/envs/openmc-env/lib/python3.10/site-packages/openmc/deplete/operator.py”, line 294, in init
self.nuclides_with_data = self._get_nuclides_with_data(cross_sections)
File “/home/amasri/miniconda3/envs/openmc-env/lib/python3.10/site-packages/openmc/deplete/operator.py”, line 787, in _get_nuclides_with_data
data_lib = DataLibrary.from_xml(cross_sections)
File “/home/amasri/miniconda3/envs/openmc-env/lib/python3.10/site-packages/openmc/data/library.py”, line 149, in from_xml
tree = ET.parse(path)
File “/home/amasri/miniconda3/envs/openmc-env/lib/python3.10/xml/etree/ElementTree.py”, line 1229, in parse
tree.parse(source, parser)
File “/home/amasri/miniconda3/envs/openmc-env/lib/python3.10/xml/etree/ElementTree.py”, line 580, in parse
self._root = parser._parse_whole(source)
xml.etree.ElementTree.ParseError: junk after document element: line 971, column 0

Does anyone know how I can remedy this, or the problem encountered in this thread

Problem running Pincell Depletion Example

Hello, whenever I try to run the Pincell Depletion example, the process seems to go in an infinite loop. While I run the example I get the following messages in the terminal RuntimeError: An attempt has been made to start a new process before the current process has finished its bootstrapping phase. This probably means that you are not using fork to start your child processes and you have forgotten to use the proper idiom in the main module: if __name__ == '__main__': …

Thank you

[paulromano]

The error you’re seeing is happening when OpenMC is trying to inspect what cross section data is available:

@amasri

data_lib = DataLibrary.from_xml(cross_sections)

To do this, it looks at the OPENMC_CROSS_SECTIONS environment variable. Have you set up this environment variable? If not, please see the relevant user’s guide section.