On Monday, May 18, 2020, 05:49:43 PM PDT, Seymour J Metz <sme...@gmu.edu> 
wrote: >> Messages in z/OS do not wrap and are not formatted.
> In the nextt paragraph you say the opposite.

It's not the opposite. Consol address space builds a line that is destination 
dependent. Compare the same message in syslog versus joblog. If that line will 
not fit in the space available for that destination, then consol will split the 
line. Destinations such as TSO CONSOLE shouldn't split lines since the buffer 
should be large enough for the largest line.
>> Multi-line messages are multiple MLWTO's 
> No, it's generally what its name suggests, a single WTO that specifies 
> multiple lines of text, > although there is a CONNECT parameter that allows 
> you to add a line to an outstanding WTO.
WTO's don't add a line to an outstanding WTO. Each message in a WTO is 
presented to the SSI as a separate message. 
The OP wanted to know about multi-line message and how they are formatted. The 
op needs to understand that messages are not formatted in any way by WTO or 
CONSOL. In fact, each message is not validated and may contain invalid hex 
values. All formatting is performed prior to issuing the WTO. The op should 
also understand that the line wrap they  see in syslog occurs because the line 
does not fit in the destination. 
The number added to the line identifies a group of messages (mlwto) because 
they may be interspersed with other messages. There are cases where messages 
have occurred days after the first line in an MLWTO. 
>> z/OS messages and codes.
> There is a z/OS MVS System Messages Volume 1 (ABA - AOM) that describes 
> message formats.
For the OP, this section may answer other questions.

Jon.  

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