Honeywell MX9 Reference Manual page 252

IfFile
Description
Begins the conditional execution of a block of commands only if the specified file exists.
Syntax
IfFile,file
Parameters
file: The path and filename to determine if the commands should be executed
Example
IfFile,\System\MyData.dat
any number of commands, executed if file exists
ElseIfFile
any number of commands, executed if file does not exist
EndIfFile
Notes
If the file already exists the commands are executed.
This test does not care if file is a file or directory.
Nesting is supported.
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