On nightly jmeter.bat not working in windows

[Jmeter Tea]

 Hello,

jmeter.bat ot jmeterw stop working on nightly build, error in console :
JMeter"" was unexpected at this time.

I suspect the following change is relevant:
if "%JM_START%" == "start" (
    set JM_START=start "Apache JMeter"
)

FYI