from Qlik help
Can Execute External Programs
If this option is selected execute statements may be used in the script.
So, you can use the execute statement in the script (often to call dos batch, example if you want to delete some files from Qlik); what's the execute statement?
Always from help
With the Execute statement it is possible to run other programs during the re-execution of the QlikView script, e.g. conversions that are necessary.
The syntax is:
commandline is a text that can be interpreted by the operating system as a command line.
Execute C:\Program Files\Office12\Excel.exe;
Execute winword macro.doc;
Execute cmd.exe /C C:\BatFiles\Log.bat
The /C needs to be included as it is a parameter to cmd.exe.