Dear all,
i have below command line in my form

     CrsSel01 = "_" + SUBSTR(SYS(2015), 4)
     .
     .
     .
     .
      replace TkCode WITH 1 IN EVALUATE("CrsSel"+PADL(ALLTRIM(STR(thisform.PageFrame1.ActivePage)),2,"0"))

it worked fine. but when i put some code in my form method ( thisform.z_CN() )

RETURN ("CrsSel"+PADL(ALLTRIM(STR(thisform.PageFrame1.ActivePage)),2,"0"))

and change command to

      replace TkCode WITH 1 IN EVALUATE(thisform.z_CN())

i get an error.
how i correct this command ?
thanks