# No OpenCascade or FLTK on GMSH

**URL:** <https://discourse.julialang.org/t/no-opencascade-or-fltk-on-gmsh/30655>\
**Category:** New to Julia\
**Tags:** gmsh\
**Created:** [November 3, 2019, 4:00pm UTC](https://discourse.julialang.org/t/no-opencascade-or-fltk-on-gmsh/30655 "2019-11-03T16:00:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Gig](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gig/32/11114_2.png) [@Gig](https://discourse.julialang.org/u/Gig)\
**Post date:** [November 3, 2019, 4:00pm UTC](https://discourse.julialang.org/t/no-opencascade-or-fltk-on-gmsh/30655/1 "2019-11-03T16:00:37Z")

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I was interesting in using GMSH with Julia.  
I’ve installe the api and everything works fine until I don’t try to use fltk or the functions in ooc that uses opencascade, if I try to run for example: gmsh.model.ooc.addBox(-R,-R,-R, 2_R,2_R,2\*R, 1),  
I revieve the following error:

gmshModelOccAddBox returned non-zero error code: 1  
error(::String) at error.jl:33  
addBox(::Float64, ::Float64, ::Float64, ::Float64, ::Float64, ::Float64, ::Int64) at gmsh.jl:3234  
top-level scope at none:0

someone know the problem?