批处理文件以“无法识别...命令”运行，如何解决此问题？

Question

I have a batch file which when executed sets PATHs, prompts user for input and loads a script via Python. The python script creates a grid with the size of each cell determined by the user input variable ( cellsize ). The following is from my .bat file:

@echo off
rem Root OSGEO4W home dir to the following directory
call "C:\OSGeo4W64\bin\o4w_env.bat"

rem List available o4w programs
rem but only if osgeo4w called without parameters
@echo on

set PYTHONPATH=C:\OSGeo4W64\apps\qgis\python
set PATH=C:\OSGeo4W64\apps\qgis\bin;%PATH%

@echo off
echo.
set /p cellsize="Enter cellsize: "
cellsize=1
cmd /k python "Script.py" %cellsize%
@echo on

The .bat works the way it's supposed to, I obtain the correct results, but I receive the following error:

'cellsize' is not recognized as an internal or external command, operable program or batch file

What simple mistake(s) did I make? I am a beginner but still learning.

Answer 1

@echo off
echo.
set /p cellsize="Enter cellsize: "
set cellsize=1
cmd /k python "Script.py" %cellsize%
@echo on

you need set

Answer 2

The line must read:

set cellsize=1

but surely this line seems more useful before the set /p line as an initialization, since otherwise it cancels the effect of that line.