Getting Error about Double Precision in Zonebudget Model Creation

[javgs-bd]

I'm following the zonebudget_example.py example for a MF6 model (section at the very end). The only thing I'm doing differently is to put the zonduget folder as a subfolder of the sim model_ws. The zone array (called 'zones') is built in a precedent step.

zbud_folder    = os.path.join(model_folder,'zbud')
zbud_exe_name  = os.path.join(bin_folder,'zbud6.exe')

if not os.path.exists(zbud_folder):
   os.makedirs(zbud_folder)

zonbud = gwf.output.zonebudget(zones)

However I'm getting an error that I can't figure out what is it about.

I have checked that the cbb file is present in the model_ws. Also, looked for any double precision option in NPF, STO and OC, and don't find one. I have also paused OneDrive syncing in case it was preventing access to the cbb file.
The most weird thing is that the same code has worked before.

Below is the full traceback. Could this be caused by some problem in the zones array rather than anything to do with the precision of the budget file?

---------------------------------------------------------------------------
Exception                                 Traceback (most recent call last)
Cell In[115], line 10
      6 if not os.path.exists(zbud_folder):
      7    os.makedirs(zbud_folder)
---> 10 zonbud = gwf.output.zonebudget(zones)
     12 zonbud.change_model_ws(zbud_folder)
     14 zonbud.write_input()

File ~\pyenvs\flopy\lib\site-packages\flopy\mf6\utils\output_util.py:251, in MF6Output.__zonebudget(self, izone)
    244 def __zonebudget(self, izone):
    245     """
    246 
    247     Returns
    248     -------
    249 
    250     """
--> 251     budget = self.__budget()
    252     grb = None
    253     if budget is not None:

File ~\pyenvs\flopy\lib\site-packages\flopy\mf6\utils\output_util.py:298, in MF6Output.__budget(self, precision)
    296 try:
    297     budget_file = os.path.join(self._sim_ws, self._budget[0])
--> 298     return CellBudgetFile(
    299         budget_file,
    300         precision=precision,
    301         modelgrid=self._model.modelgrid,
    302     )
    303 except OSError:
    304     return None

File ~\pyenvs\flopy\lib\site-packages\flopy\utils\binaryfile.py:1058, in CellBudgetFile.__init__(self, filename, precision, verbose, **kwargs)
   1055     self.nnodes = self.modelgrid.nnodes
   1057 if not success:
-> 1058     raise Exception(
   1059         f"Budget file could not be read using {precision} precision"
   1060     )

Exception: Budget file could not be read using double precision

[javgs-bd]

I'm almost sure this is a onedrive syncing issue. I'm getting another error now related to the output csv file that seems to be syncing.
I wonder why this does not happen with other MF files.

FloPy is using the following executable to run the model: ..\..\00-bin\zbud6.exe
                              ZONEBUDGET Version 6
                             U.S. GEOLOGICAL SURVEY
                            VERSION 6.4.2 06/28/2023

ERROR REPORT:

  1. Could not open "zonebud.csv" on unit 21. Specified file status REPLACE.
     Specified file format FORMATTED. Specified file access SEQUENTIAL.
     Specified file action READWRITE. IOSTAT error number 30. STOP EXECUTION
     in subroutine openfile().

(False, [])

[javgs-bd]

For anyone looking into something similar, I can confirm this is a problem with file syncing process. Once I stopped it completely the problems went away. It remains unsolved to me why this never happens with files used by mf6, but does with files used by zonebudget6.