UpdateCursor sequence error

[AdamG2]

Hey community,

Very infrequent poster here, so I'll try my very best to explain this with as much detail as possible. 

I'm trying to write a bespoke script tool for ArcGIS Pro (2.7) using Python (3.7).

I'm trying to use an UpdateCursor to update the rows of a .dbf table (outDBFTable). But when I run the script, I get the classic error "TypeError: sequence size must match size of the row". But when diagnostics 2 and 4 run, it appears the rows do in fact have the same number of elements. 

outDBFTable attributes:

OBJECTID	field1	field2	field3	field4	...
1	<Null>	<Null>	...
2	<Null>	...
3	...
4
5
6
7

rasTable attributes:

OBJECTID	Count
1	<number>
2	...
3
4
5
6
7

...

counter2 = 0
with arcpy.da.SearchCursor(inPoly,"SHAPE@") as sCursor2:
    for sRows2 in sCursor2:
        maskExtract = arcpy.sa.ExtractByMask(reclassRas,sRows2)
        rasTable = arcpy.management.BuildRasterAttributeTable(maskExtract) 
        arcpy.AddMessage(rasTable) # diagnostics 1

        with arcpy.da.SearchCursor(rasTable,("Value","Count")) as sCursor3:
            for sRows3 in sCursor3:
                arcpy.AddMessage(sRows3) # diagnostics 2

                with arcpy.da.UpdateCursor(outDBFTable,("OBJECTID",fieldList[counter2])) as uCursor1:
                    arcpy.AddMessage(uCursor1)# diagnostic 3
                    for uRows1 in uCursor1:
                        arcpy.AddMessage(uRows1) # diagnostics 4
                        if sRows3[0] == uRows1[0]:
                            arcpy.AddMessage("true true") # diagnostics 5
                            uCursor1.updateRow([sRows3[1]]) # <- Error raised here
                        else:
                            arcpy.AddMessage("false false") # diagnostics 6

        counter2 =+ 1

del (sCursor2)
del (sCursor3)
del (uCursor1)

...

Every time sCursor2 performs its task and produces a new rasTable, I want to use the "Count" column <number> from rasTable to update outDBFTable fields where outDBFTable "OBJECTID" == rasTable "OBJECTID". The counter is in there to position the cursor over the correct field from fieldList (field1, field2...) every time a new rasTable is produced. Mechanically, I'm confident all of this works because if I comment out  "uCursor1.updateRow([sRows3[1]])", the printout in the ArcGIS Pro tool message dialogue box behaves just as I expect. Or based on the error, I'm overly confident...

Basically, I don't understand why I'm getting a sequence size error when the diagnostics show the rows to be the same size.

I've attached a image of the error dialogue. 

Please let me know if more information is needed. 

Any help would be great!

[AdamG2]

Well I guess this really shows my true experience with Python... (...pretty low). I had originally wanted to use Zonal Statistics because I thought it would be the right tool, but I wasn't able to get it to work the way I wanted. 

[DanPatterson]

counters align with the nearest 'for' not the 'while'

either indent or dedent your counter as appropriate

[AdamG2]

Hi DanPatterson,

Thank you for your comments. 

Not sure if you get notifications when your handle is mentioned, so I wanted to notify you about what I should do for accepting the solution. If you go check out my reply to @Anonymous User's post, you'll see what I mean.

Thanks 

[DanPatterson]

counters are always +=, -=, /=  etc with the = sign on the right.

c = c + 1  makes a new object

c += 1  changes an existing object in place

The reason I question the location of the counter is because "with" is a context operator and I wanted to check to see if you wanted to increate the counter within a "for" loop or after it is done.

As for the answers, you can check as many as you feel helped get to your solution, so all is good.

[AdamG2]

Great, thank you for that clarification. Also I didn't realize I could mark several solutions. Great feature.

As for the counter, I wanted it to increase with every iteration of the highest level "for loop". It accomplishes that where it is. Thanks for all your help!