How to solve: "OSError: Error reading file './chain_simple.xml': failed to load external entity "./chain_simple.xml"

User Support
1

I tried to launch this demo case-- pincell depletion.

but I encountered issue in line 25, could you help me locate it?

OSError Traceback (most recent call last)
in
----> 1 chain = openmc.deplete.Chain.from_xml("./chain_simple.xml")

~/.local/lib/python3.8/site-packages/openmc/deplete/chain.py in from_xml(cls, filename, fission_q)
535
536 # Load XML tree
→ 537 root = ET.parse(str(filename))
538
539 for i, nuclide_elem in enumerate(root.findall(‘nuclide’)):

src/lxml/etree.pyx in lxml.etree.parse()

src/lxml/parser.pxi in lxml.etree._parseDocument()

src/lxml/parser.pxi in lxml.etree._parseDocumentFromURL()

src/lxml/parser.pxi in lxml.etree._parseDocFromFile()

src/lxml/parser.pxi in lxml.etree._BaseParser._parseDocFromFile()

src/lxml/parser.pxi in lxml.etree._ParserContext._handleParseResultDoc()

src/lxml/parser.pxi in lxml.etree._handleParseResult()

src/lxml/parser.pxi in lxml.etree._raiseParseError()

OSError: Error reading file ‘./chain_simple.xml’: failed to load external entity “./chain_simple.xml”

Many thanks!

2

issue
issue1374×788 209 KB

3

Solution tried: use download-xs.sh in home/openmc/tools/ci to re-download the library and add it to the environment, but it has no effect.

4

You can find the chain_simple.xml file in the tests/ directory of the OpenMC repository:

5

Many Thanks. got it.

6

Hi there,

I have tried all the same but this won’t work in my case. Can you please let me know why this is so?

Screenshot (184)
Screenshot (184)1112×435 189 KB

7

You need to provide the chain file not the Chain object to Operator

op = openmc.deplete.Operator(geometry, settings, "./chain_simple.xml")
8

how did you solve this problem?