Python script with memory for intermediate data: wrong calculations

IlkaIllers1

I have a python script that uses the georprocessing tools Copy, Intersect, MultipartToSinglepart, RepairGeometry, CalculateField, GenerateNearTable, Sort, Dissolve, Buffer, AddField, JoinField, and da.UpdateCursor. 

When I write the intermediate data to a Scratch gdb, the model works fine. However, when I write the intermediate data to the /memory, the calculations from the UpdateCursor are not being calculated correctly. The model runs without error messages, but the returned values are wrong. 

Any ideas why this might be happening?

IlkaIllers1

Hello @DanPatterson 

I probably mentioned model because it used to be a model which took a long time to run, which is why I wanted to change it into a python script with the intermediate data stored in the memory. It is rather a long script... probably too long to share all of it. I shared the part where the calculation goes wrong.

# Add and Calculate "Area_ha_in", "Area_perc_in"
arcpy.management.AddField(in_table=_Name_criteria_diss, field_name="Area_ha_in", field_type="DOUBLE")[0]
arcpy.management.AddField(in_table=_Name_criteria_diss , field_name="Area_perc_in", field_type="SHORT")[0]
arcpy.management.AddField(in_table=_Name_criteria_diss, field_name="FID_location_criteria", field_type="TEXT", field_length=1000)[0]
with arcpy.da.UpdateCursor(_Name_criteria_diss, ["Area_ha_in","Area_perc_in","FID_location_criteria","SUM_Shape_Area","Shape_Area_location","FID_common","criteria_ID"]) as cursor:
        for row in cursor:
          z = row[3]/10000
          a = float(str(z).replace(',', '.'))
          b = round(a,2)
          row[0] = b
          u = (row[3]/row[4]) *100
          v = float(str(u).replace(',', '.'))
          w = int(round(v,0))
          row[1] = w
          row[2] = row[5] + row[6]
          cursor.updateRow(row)