[From string (line 102) ]                                                                                                   
                                                                                                                            
@startuml                                                                                                                   
actor Tusr as "User"                                                                                                        
box PRODUCT XXX #E4F1DB                                                                                                     
	participant Tcpu as "XXX CPU\n(A! Chipset)"                                                                                
	participant Tbt as "YY TRX\n(A1 Chipset)"                                                                                  
...                                                                                                                         
... ( skipping 77 lines )                                                                                                   
...                                                                                                                         
		prodId = $var("prodId")                                                                                                   
		prodSession = $var("prodSessionId")                                                                                       
		timeBtOffset = $var("btTimeOffset"), if available; otherwise write $nul                                                   
		timeAdjusted = $bold("timeClock") + $bold("timeBtOffset"), if time offset is available; otherwise write $nul              
                                                                                                                            
	$bold("TPS - XXX Process Summary")                                                                                         
		processId = $bold($b)                                                                                                     
		processRequester = $var($b + "Requester")                                                                                 
		processStart = $var($b + "Start")                                                                                         
		processStartRaw = $var($b + "StartRaw")                                                                                   
		processElapsed = $bold($nul)                                                                                              
		processEnd = $bold($nul)                                                                                                  
		processEndRaw = $bold($nul)                                                                                               
                                                                                                                            
	$bold("TMH - XXX Message Footer")                                                                                          
		ediStatus = $var($b + "EdiStatus")                                                                                        
end note                                                                                                                    
return : OK.                                                                                                                
note over Tusr, OMSofficer #physical : $bold("The process activity unique to this sub-routine begins below this line.")  ...
!endfunction                                                                                                                
^^^^^                                                                                                                       
 This function does not have any !return directive. Declare it as a procedure instead ?