Batch file - Executing - in Drive E: - The system cannot find the path specified

I have the following program, but it is failing because it cannot find the path specified.
It is something with being executing from drive E:

set newDate=%date:~4,2%-%date:~7,2%-%date:~10%
set arg=OEM10G
set WorkingDirectory=C:\Program Files\Veritas\NetBackup\bin
set Logs=E:\oracle\Dba\logs\hot_backup_logs\hot_backup_logs
set Scripts=E:\oracle\Dba\scripts\hot_backup_scripts
Set History=E:\oracle\Dba\logs\historial
set LogFile=%Logs%\logfile.txt
set VerifyFile=%Logs%\Verificacion.log
set BorrameFile=%Logs%\borrame.txt
set HistoryFile=%History%\OEM10G_hotbackup_HISTORIAL.log
set Server=OEM10G
set Today=%Date:~4,2%-%Date:~7,2%-%Date:~10%
set Policy=Windows-Servers-dbs
set LogFile=%Logs%\OEM10G_Hotback.%Today%.log
set FileList=%Scripts%\OEM10Glist.txt
e:
start E:\oracle\Dba\scripts\hot_backup_scripts\hot_OEM10G_backup.bat

C:
cd "C:\Program Files\Veritas\NetBackup\bin"
start bpbackup -p Windows-Servers-dbs -s %arg% -L E:\oracle\Dba\logs\hot_backup_logs\%arg%_Hotback.%newDate%.log -f E:\oracle\Dba\scripts\hot_backup_scripts\%arg%list.txt
e:
goto :Queued

:Queued
   e:
   call %Scripts%\WAIT.bat 5
   (  tasklist /fi "IMAGENAME eq bpbkar32.exe"
      tasklist /fi "IMAGENAME eq bpcd.exe"
   )>%BorrameFile%

  findstr /i /s "bpbkar32.exe bpcd.exe" %BorrameFile%

  if %errorlevel% equ 1 (
      echo Veritas lo puso en Queued>%VerifyFile%
      echo error level is %errorlevel%>>%LogFile%
      goto :Queued
   ) else (
      e:
      goto :Loop
     )
     

:Loop
        e:
      call E:\oracle\Dba\scripts\hot_backup_scripts\WAIT.bat 10
      tasklist.exe /fi "IMAGENAME eq bpbkar32.exe">E:\oracle\Dba\logs\hot_backup_logs\borrame.txt
      tasklist.exe /fi "IMAGENAME eq bpcd.exe">>E:\oracle\Dba\logs\hot_backup_logs\borrame.txt
      findstr /i /s "bpbkar32.exe bpcd.exe" E:\oracle\Dba\logs\hot_backup_logs\borrame.txt
      if %errorlevel% equ 0 (
            echo Todavía está corriendo el envío a Veritas > E:\oracle\Dba\logs\hot_backup_logs\Verificacion.log
            echo error level is %errorlevel% >>E:\oracle\Dba\logs\hot_backup_logs\logfile.txt
            Goto :Loop
       ) else (
            echo Terminó el envio a Veritas >> E:\oracle\Dba\logs\hot_backup_logs\Verificacion.log
            echo error level is %errorlevel% >>E:\oracle\Dba\logs\hot_backup_logs\logfile.txt
            start E:\oracle\Dba\scripts\hot_backup_scripts\hot_OEM10G_backup_end.bat
            Goto :Terminar
      )

:Terminar
      e:
      type E:\oracle\Dba\logs\hot_backup_logs\%arg%_Hotback.%newDate%.log >> E:\oracle\Dba\logs\hot_backup_logs\hot_OEM10G.%newDate%.log
      type  E:\oracle\Dba\logs\hot_backup_logs\%arg%_Hotback.%newDate%.log >> E:\oracle\Dba\logs\historial\OEM10G_hotbackup_HISTORIAL.log  
      ECHO Y | DEL E:\oracle\Dba\logs\hot_backup_logs\%arg%_Hotback.%newDate%.log
      findstr /C:"ORA-" E:\oracle\Dba\logs\hot_backup_logs\hot_OEM10G.%newDate%.log
      if %errorlevel% equ 0 (
            cscript E:\oracle\Dba\scripts\hot_backup_scripts\sent_log.vbs
      ) else (
            findstr /C:"status = 0" E:\oracle\Dba\logs\hot_backup_logs\hot_OEM10G.%newDate%.log
            if %errorlevel% neq 0 (
                  cscript E:\oracle\Dba\scripts\hot_backup_scripts\sent_log.vbs
      )
      
      exit;