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bug: expected fields in evt binary file #2057

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martclanor opened this issue Jan 14, 2024 · 0 comments
Open

bug: expected fields in evt binary file #2057

martclanor opened this issue Jan 14, 2024 · 0 comments
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@martclanor
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martclanor commented Jan 14, 2024

Describe the bug
python version: 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:50:30) [MSC v.1933 64 bit (AMD64)]
numpy version: 1.26.2
flopy version: 3.5.0

When creating evt binary files, there seems to be a bug about the mismatch of the data and header in the _build_data_array function of MFFileAccessList.

To Reproduce
As an example, I use the model: https://github.com/modflowpy/flopy/blob/develop/.docs/Notebooks/mf6_simple_model_example.py
If I insert the following evt package before line 190:

evt = flopy.mf6.modflow.mfgwfevt.ModflowGwfevt(
    gwf,
    stress_period_data={
        0: {
            "data": [((0, 0, 0), 5, 0.0004, 1.0, 1.0)],
            "filename": ".evt_bin",
            "binary": True,
        }
    },
    nseg=1,
    maxbound=1,
    surf_rate_specified=True,
)

I get: ValueError: could not assign tuple of length 7 to structure with 8 fields.

Expected behavior
I do not expect this error because when I export evt as a text file ("binary" flag above set to False), it seems to work fine.

Additional context
I tried looking a bit around and saw the following which might be useful:

  • the error is raised in flopy/mf6/data/mffileaccess.py line 1093 when it is attempted to create a numpy array provided the mismatching data and header
return np.array(data_list, dtype=header)
  • header (length = 8)
    image

  • data:
    image

  • data_list (length = 7):
    image

  • Not sure but it seems like pxdp and petm are mistakenly included in the header instead of petm0 (which as an MFDataItemStructure object is set to "optional").

Thanks a lot for taking the time to read this.

@martclanor martclanor added the bug label Jan 14, 2024
@wpbonelli wpbonelli added this to the 3.6.1 milestone Apr 24, 2024
@wpbonelli wpbonelli modified the milestones: 3.6.1, 3.7.0 May 1, 2024
@wpbonelli wpbonelli modified the milestones: 3.7.0, 3.7.1 May 23, 2024
@mjreno mjreno self-assigned this Jun 14, 2024
@wpbonelli wpbonelli modified the milestones: 3.7.1, 3.8.0 Jun 17, 2024
@wpbonelli wpbonelli modified the milestones: 3.8.0, 3.8.1 Aug 5, 2024
@wpbonelli wpbonelli modified the milestones: 3.8.1, 3.9.1 Sep 4, 2024
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