The function SysIni()

Using the function <SysIni to write data to a non-existing ini file 
creates a file with that name. 

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The function <SYSINI returns ERROR: if called about 12900 (+/- 100) times 
in a loop to retrieve/set a value from/in one or more INI files. After the 
error occurs, you can't use the function <SYSINI in that session anymore. 
To get around this, you have to close the session and open another. 

(see also RxIni)