# MPI case sensitivity

**URL:** <https://fortran-lang.discourse.group/t/mpi-case-sensitivity/2769>\
**Category:** Help\
**Created:** [February 11, 2022, 7:07pm UTC](https://fortran-lang.discourse.group/t/mpi-case-sensitivity/2769 "2022-02-11T19:07:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fortran4r](https://avatars.discourse-cdn.com/v4/letter/f/9de0a6/32.png) [@fortran4r](https://fortran-lang.discourse.group/u/fortran4r)\
**Post date:** [February 11, 2022, 7:07pm UTC](https://fortran-lang.discourse.group/t/mpi-case-sensitivity/2769/1 "2022-02-11T19:07:32Z")

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Does Fortran’s case insensitivity still apply when using MPI? I found this SO post:

> <https://stackoverflow.com/questions/47125128/unresolved-external-symbol-mpi-init-when-compiling-mpi-with-pgi-visual-fortran>

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**Author:** ![sblionel](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/sblionel/32/853_2.png) [@sblionel](https://fortran-lang.discourse.group/u/sblionel)\
**Post date:** [February 12, 2022, 6:21pm UTC](https://fortran-lang.discourse.group/t/mpi-case-sensitivity/2769/3 "2022-02-12T18:21:30Z")

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Fortran has robust support for C interoperability, including dealing with name case. Typically, the Fortran source for MPI support includes/modules deals with naming conventions appropriately.