Re: [pflotran-users: 8751] ERROR during Correcting UGE volumes with fracture apertures

[Hammond, Glenn E]

Sujin,

Could you let me know how you are generating the .uge file? Are you using dfnWorks for this process?

Glenn

From: pflotra...@googlegroups.com <pflotra...@googlegroups.com> on behalf of SUJIN <sj24...@knu.ac.kr>
Date: Thursday, April 9, 2026 at 12:36 AM
To: pflotran-users <pflotra...@googlegroups.com>
Subject: [pflotran-users: 8751] ERROR during Correcting UGE volumes with fracture apertures

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Hi all,

Starting from the 'Correcting UGE volumes with fracture apertures' step, an error occurs repeatedly. The error message is as follows:
------------------------------------------------------------------------------
Helpful information for debugging the input deck:
    Filename : full_mesh_vol_area.uge
 Line Number : 20463
     Keyword : SUBSURFACE,GRID,CELLS
------------------------------------------------------------------------------
ERROR: While reading "cell volume" under keyword: Explicit Unstructured Grid CELLS.
Stopping!
------------------------------------------------------------------------------

After checking `full_mesh_vol_area.uge`, I found that the values in the fifth column are `nan`. For reference, the hydraulic property distribution was set as follows:
hy_variable = 'transmissivity'
hy_function = 'log-normal'
hy_params = {"mu": -8.275, "sigma": 1.05}

Could anyone help me understand what may be causing this issue and how to fix it?

Best regards,

SUJIN

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[SUJIN]

Yes, I am using dfnWorks to generate the .uge file.
I have attached the script used for this process for your reference.

Best regards,

SUJIN

2026년 4월 12일 일요일 오전 4시 36분 54초 UTC+9에 Hammond, Glenn E님이 작성:

[Hammond, Glenn E]

Sujin,

Since I do not have experience with dfnWorks, I recommend contacting dfnw...@lanl.gov for specialized guidance. While there are users familiar with dfnWorks, they may not be actively monitoring this user list.

Glenn

To view this discussion visit https://groups.google.com/d/msgid/pflotran-users/34c7c6e5-b1fe-47ec-8624-271c5c8985fbn%40googlegroups.com.

[SUJIN]

Dear Glenn,

Would this mean that the current error should be investigated in the generation stage using dfnWorks, rather than in the flow stage using PFLOTRAN?
For your reference, the generation process was completed without any issues.

Best regards,

SUJIN

2026년 4월 13일 월요일 오후 11시 19분 51초 UTC+9에 Hammond, Glenn E님이 작성: