Is it possible to run Vantage with z/OS 2.3 without PTF RO94154?

Document ID : KB000112185
Last Modified Date : 27/08/2018
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Question:
As per z/OS Compatibility Matrix PTF RO94154 is required for z/OS 2.2 and 2.3.
However, I am currently running z/OS 2.2 without this PTF without any problem and would like to upgrade to 2.3.
Do I have to install this PTF before upgrading to z/OS 2.3?
Answer:
This PTF is required for symbolic names and/or values longer than 8 characters, which was introduced with z/OS 2.2.
As long as the new symbolic format is not used, the PTF does not need to be installed.

Please note the following from the description of the PTF:

This sysmod supports the new limits for SYMDEFS on z/OS 2.2 as        
follows:                                                              
                                                                      
-  Symbolic name length limit is 16 characters (including '&' and     
   '.' 18 characters)                                                 
-  If the symbolic name ends with '_', the value length limit is 44   
   characters.                                                        
-  If the symbolic name does not end with '_', the value length limit
   is 16 characters.