Online Help states that a String can be 255 characters in size but an error is seen when trying to set the size to this number. Changing the String Size of a String object results in an error "Cannot set the StringSize. Attribute value is invalid".
The size of String objects depends on the controller that the object is being created in. bCX1 and Netcontrollers support String objects with a size of 132 characters, i2 and b3 controllers only support String objects with a maximum size of 32 characters.
The documented value of 255 as the maximum String Size, as stated in the online Continuum Help, is not correct. Network controllers can support String objects with a maximum size of 132 characters whereas subnet controllers can support a maximum of 32 characters.