Originally Posted by lupito_ct

The numbers, are the length of path+filename :
/ICONS/RR/POI_RADARS.PNG -> This are 24 chars (count it one-by-one)
/ICONS/NAVI0X/POI_RADARS.PNG -> This are 28 chars (count it one-by-one)

If you want use a icon named "POI_SPEED_CAMERAS.PNG" you must will use :
/ICONS/RR/POI_SPEED_CAMERAS.PNG -> This are 31 chars
/ICONS/NAVI0X/POI_SPEED_CAMERAS.PNG -> This are 35 chars

Then S024 will be S031, this limit the lenght of the full string of complete path of icon.

Regards