>

>IF m.StoreMessage AND m.MessageCount > 0
>   m.StoreMessage = .F.
>   ? 'STORE MESSAGE'
>ENDIF
>

Almost, but this does exactly what I want except the STORE after the last message:

strProcessData = tInput

m.MessageCount = 0
m.MessageLineCount = 0

FOR ix=1 TO ALINES(laLines,strProcessData)

		STORE LineToObject(laLines[m.ix]) TO ('loObj'+LTRIM(STR(m.ix)))
		m.Segment = ALLTRIM(UPPER(EVALUATE('loObj'+LTRIM(STR(m.ix))+".Segment")))
		DO CASE 
			CASE m.Segment = 'MSH'
				IF m.MessageCount > 0
					? 'STORE MESSAGE'
				ENDIF
				m.MessageCount = m.MessageCount + 1
				m.MessageLineCount = 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'MSH Segment'
			CASE m.Segment = 'EVN'
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'EVN Segment'
			CASE m.Segment = 'PID'
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'PID Segment'
			CASE m.Segment = 'PV1'
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'PV1 Segment'
			CASE m.Segment = 'FT1'
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'FT1 Segment'
			CASE m.Segment = 'ORC'
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'ORC Segment'
			CASE m.Segment = 'DG1'
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'DG1 Segment'
			OTHERWISE
				m.MessageLineCount = m.MessageLineCount + 1
				? LTRIM(STR(m.MessageCount)) + ' - ' + LTRIM(STR(m.MessageLineCount )) + ': ' + 'Undefined Segment'
		ENDCASE

ENDFOR