[megaloman]

Код:

@Echo Off
cls
	Set "FileIn=Z:\Box_In\1 текстовый файл.txt"
	Set "FileOut1=Z:\Box_In\2 текстовый файл.txt"
	Set "FileOut2=Z:\Box_In\3 текстовый файл.txt"

	Set "Begin="relatedCount":"
	Set "End="wasLoaded":"

	Set /P InTxt=<"%FileIn%"

	Call Set "OutTxt=%%InTxt:%Begin%=*%%"
	Call Set "OutTxt=%%OutTxt:%End%=*%%"

	For /F "tokens=2 delims=*" %%i IN ("%OutTxt%") Do (
		>"%FileOut1%" (Echo %%i)
		>"%FileOut2%" (Call Echo %%InTxt:%%i=%%)
	)
Pause
Exit /B