parenthesis in fluka cell definitions

[py1sl]

Fluka appears to have a limit on the number of terms enclosed by parenthesis. Converting a large MCNP cell can lead to geometry that looks okay in flair but gives the following error when run

*** Too many terms in parenthesis expansion ***
*** Execution terminated ***

I cannot yet find details of what is the limit for the number of terms.
it also does not give a great indication of which cells are the problem.

[makeclean]

It doesn't, it's a fundamental issue with fluka. Its not just parentheses it's also unions. There is a limit I just can't recall what it is. There's also a maximum cell limit of 100k. There are some really simple Mcnp geometries that fluka can't tolerate at all.

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________________________________ From: Steve Lilley <notifications@github.com> Sent: Tuesday, October 1, 2019 1:58:31 PM To: makeclean/csg2csg <csg2csg@noreply.github.com> Cc: Subscribed <subscribed@noreply.github.com> Subject: [makeclean/csg2csg] parenthesis in fluka cell definitions (#35) Fluka appears to have a limit on the number of terms enclosed by parenthesis. Converting a large MCNP cell can lead to geometry that looks okay in flair but gives the following error when run *** Too many terms in parenthesis expansion *** *** Execution terminated *** I cannot yet find details of what is the limit for the number of terms. it also does not give a great indication of which cells are the problem. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#35?email_source=notifications&email_token=AASTUSVQD3WB4LSPPGR5YKDQMNCPPA5CNFSM4I4JED3KYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4HO2ZVPA>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AASTUSQERSY3MHS3H4MN543QMNCPPANCNFSM4I4JED3A>.

[makeclean]

That last should start *it does!*

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________________________________ From: Davis, Andrew Sent: Tuesday, October 1, 2019 2:02:25 PM To: makeclean/csg2csg <reply@reply.github.com>; makeclean/csg2csg <csg2csg@noreply.github.com> Cc: Subscribed <subscribed@noreply.github.com> Subject: Re: [makeclean/csg2csg] parenthesis in fluka cell definitions (#35) It doesn't, it's a fundamental issue with fluka. Its not just parentheses it's also unions. There is a limit I just can't recall what it is. There's also a maximum cell limit of 100k. There are some really simple Mcnp geometries that fluka can't tolerate at all.

________________________________ From: Steve Lilley <notifications@github.com> Sent: Tuesday, October 1, 2019 1:58:31 PM To: makeclean/csg2csg <csg2csg@noreply.github.com> Cc: Subscribed <subscribed@noreply.github.com> Subject: [makeclean/csg2csg] parenthesis in fluka cell definitions (#35) Fluka appears to have a limit on the number of terms enclosed by parenthesis. Converting a large MCNP cell can lead to geometry that looks okay in flair but gives the following error when run *** Too many terms in parenthesis expansion *** *** Execution terminated *** I cannot yet find details of what is the limit for the number of terms. it also does not give a great indication of which cells are the problem. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#35?email_source=notifications&email_token=AASTUSVQD3WB4LSPPGR5YKDQMNCPPA5CNFSM4I4JED3KYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4HO2ZVPA>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AASTUSQERSY3MHS3H4MN543QMNCPPANCNFSM4I4JED3A>.

[py1sl]

Perhaps it is something csg2csg can check for and warn / not produce the Fluka input file.
Ultimately some unrolling of brackets could be done, but I'm not that smart to be able to generalise how it would work.

[makeclean]

Picking this back up, 1 year later, Im not smart enough either - maybe a summer project?