>>>

lcString="ABC,DEF,GHI,JKL"
>>>lcString2=""
>>>x=0
>>>do while x<len(m.lcString)
>>>  x=m.x+1
>>>  IF SUBSTR(m.lcString,m.x,1)<>","
>>>    lcString2=m.lcString2+substr(m.lcString,m.x,1)
>>>  ENDIF
>>>enddo X
>>>?m.lcString2

>>
>>I get ABCDEFGHIJKL, is that a surprise? Apart from showing that Substr() accepts 0 for the start position, I mean?
>
>My code does not show that substr accepts 0 for the start position.

Premature optimization brings one to zero... um, brings one to interesting results.