Resolution:
The following are the subject structure and subject length allowed to send by TIBCO Rendezvous.

Structure
Each subject name is a string of characters that is divided into elements by the dot (.) character.
It is illegal to incorporate the dot character into an element by using an escape sequence.

Length
Rendezvous limits subject names to a total length of 255 characters (including dot separators).
However, some of that length is reserved for internal use. The longest subject that (most) programs
can receive is 196 characters.  The maximum total length (in characters) of subjects that your programs
may send is 196 minus the number of elements. Include dot separators in this total. The maximum element
length is 127 characters (dot separators are not included in element length).

So the maximum possible length of the subject name can be sent by the program is 196.  In this, if you have
three elements separated by two dots like &ltsubject element1>.&ltsubject element2>.&ltsubject element3>
the maximum allowed subject length will be 196 (subject length) - 3 (element count) = 193