![]() Starting a new process with CALL, is very similar to running START /wait, in both cases the calling script will (usually) pause until the second script has completed. In a batch file, an alternative is to use TIMEOUT to delay processing of individual commands. Echo StartingĪdd /B to have everything run in a single window. This can be done by explicitly running CMD /C. In most cases you will want the batch script to complete and then just close it's CMD console to resume the initial batch script. However if you replace calc.exe with Winword.exe, to run Word instead, then the /wait will stop working, this is because Winword.exe is a stub which launches the main Word application and then exits.Ī similar problem will occur when starting a batch file, by default START will run the equivalent of CMD /K which opens a second command window and leaves it open. The above will start the calculator and wait before continuing. The /WAIT option should reverse the default 'run in parallel' behaviour of START but again your results will vary depending on the item being started, for example: Echo Starting Often you can work around this issue by creating a one line batch script ( runme.cmd ) to launch the executable, and then call that script with START runme.cmd Start /Wait In practice you just need to test it and see how it behaves. For arcane technical reasons, this does not work for some types of executable, in those cases the process will act as a blocker, pausing the main script until it's complete. The default behaviour of START is to instantiate a new process that runs in parallel with the main process. The default value for the PATHEXT variable is. Which file extensions to search for and in what order. If you START an application without a file extension (for example WinWord instead of WinWord.exe)then the PATHEXT environment variable will be read to determine To minimise any chance of the wrong exectuable being run, specify the full path to command or at a minimum include the file extension: START "" notepad. START "" MarchReport.DOC will launch the application associated with the. In a batch script, a START command without /wait will run the program and just continue, so a script containing nothing but a START command will close the CMD console and leave the new program running.ĭocument files can be invoked through their file association just by typingĮ.g. This means that the window will remain after the command has been run. ![]() If command is an internal cmd command or a batch file then the command processor is run with the /K switch to cmd.exe. (default) 32 bit only.Īlways include a TITLE this can be a simple string like "My Script" or just a pair of empty quotes ""Īccording to the Microsoft documentation, the title is optional, but depending on the other options chosen you can have problems if it is omitted. SEPARATE Start in separate memory space. The process will be restricted to running on these processors. AFFINITY The processor affinity mask as a hexadecimal number. NODE The preferred Non-Uniform Memory Architecture (NUMA) Use the original environment passed to cmd.exe ![]() I Ignore any changes to the current environment, typically made with SET. In this caseĬtrl-C will be ignored - leaving Ctrl-Break as the only way to B Start application without creating a new window. BELOWNORMAL Use BELOWNORMAL priority class. ABOVENORMAL Use ABOVENORMAL priority class. W or /WAIT Start application and wait for it to terminate. Parameters The parameters passed to the command. Title Text for the CMD window title bar (required.)Ĭommand The command, batch file or executable program to run. Start a program, command or batch script, opens in a new/separate Command Prompt window.
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