# 3D error and warning

**URL:** <https://community.freefem.org/t/3d-error-and-warning/850>\
**Category:** General Discussion\
**Created:** [March 13, 2021, 7:25am UTC](https://community.freefem.org/t/3d-error-and-warning/850 "2021-03-13T07:25:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![guanzhen](https://avatars.discourse-cdn.com/v4/letter/g/f04885/32.png) [@guanzhen](https://community.freefem.org/u/guanzhen)\
**Post date:** [March 13, 2021, 7:25am UTC](https://community.freefem.org/t/3d-error-and-warning/850/1 "2021-03-13T07:25:56Z")

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Dear Sir/Madam  
When I solve a 3D example with FreeFEM, the following error has occurred:  
“Error umpfack umfpack\_di\_numeric status -1  
Error umfpack\_di\_solve status -3”  
I don’t know why?  
Thank you very much!

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**Author:** ![prj](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@prj](https://community.freefem.org/u/prj)\
**Post date:** [March 13, 2021, 5:45pm UTC](https://community.freefem.org/t/3d-error-and-warning/850/2 "2021-03-13T17:45:03Z")

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Probably because your problem is too big and you need to change to another solver, e.g., UMFPACK64, MUMPS, or PETSc.