Error loading SWAT+ Check. Exception: 'fldcult' Traceback (most recent call last): File "actions\get_swatplus_check_toolbox.py", line 159, in get KeyError: 'fldcult'

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Camilla Negri

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Jun 8, 2026, 8:08:55 AM (2 days ago) Jun 8
to SWAT+ Editor

Hi there,

Any help appreciated, more info below.

1. Primary Issue Location

  • Component: SWAT+ Editor
  • Area of impact: input/output

2. Software Versions

  • SWAT+ Editor 3.2.4

3. Project Characteristics

  • Watershed Details: Maskinonge River, Ontario, 2000 ha, roughly 800 HRUs
  • Modeling Aim:  water quality

4. Description of Issue

  • The Problem: I have been working on getting the management right, so the main files I've been changing are management.sch, plant.ini, landuse.lum
  • Step to Reproduce: testing the mgt files with a short-ish simulation 1998-2002, the error shows up after clicking run  SWAT+ Check 
  • Error loading SWAT+ Check. Exception: 'fldcult' Traceback (most recent call last): File "actions\get_swatplus_check_toolbox.py", line 159, in get KeyError: 'fldcult' - then the interface asks to re-configure the model run 

5. Supporting Data (Optional)

  • Link to TxtInOut folder: I don't have this but can provide  if necessary

Many thanks and best wishes,
Camilla 

Jaclyn Tech

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Jun 9, 2026, 10:57:46 AM (17 hours ago) Jun 9
to SWAT+ Editor
Hi, looks like there is a parsing problem reading the mgt.out file. Your quickest fix for now is to either:

1. Re-run but first uncheck the management output file. Under "Choose options to print" expand "Advanced options" on the right and uncheck the management output file box. Then re-run all steps.
2. Or, if you don't want to re-run, simply remove or rename the "mgt_out" table in your output database. From your project folder go to Scenarios/Default/Results and open swatplus_output.sqlite (more info about opening sqlite here if you need it: https://swatplus.gitbook.io/docs/user/how-to-use-sqlite)

We'll have a patch for this soon! Just happened to catch at a tough time with the conference coming up next week, so it will be a little delayed.

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