empty file while when exporting netlist cdl

Hello guys,.. i have few doubts..mentioned below...

for above gui,

Now when user selects cell view then it should export the  cdl netlist for the cell select from libraray manager-       ;;;;;;;;;;;;;;;;;;cell view is lib name and topcell is cell name

procedure(CCSRunNetlisterCell(cell_check cell_top viewName runDir simulatorName)
let( ( op runDirPath singleFile mvFile )

cell_check = form->cell_view_Entry->value
cell_top = form->Topcell->value

runDirPath=strcat(runDir "/" cell_top)
simInitEnvWithArgs(runDirPath cell_check cell_top viewName simulatorName nil)

op=outfile(strcat(runDirPath "/si.env") "a")
fprintf(op "incFILE=\"\" \n")
fprintf(op "setEQUIV=\"\" \n")
close(op)

netlist()

mvFile=sprintf(nil "mv -f ./%s/netlist ./%s/%s.cdl" runDirPath runDirPath cell_top)
singleFile=sprintf(nil "cat ./%s/%s.cdl >> ./%s/netlist.cdl" runDirPath cell_top runDir)
system(mvFile)
system(singleFile)
printf("Netlisting the cell:%L from Library:%L in the path:%L\n" cell_top cell_check runDirPath)

) ; let
) ;procedure
cell_check = form->cell_view_Entry->value
cell_top = form->Topcell->value
CCSRunNetlisterCell("%s" "%s" "schematic" "CDL" "auCdl" cell_check cell_top)

netlist = simplifyFilename(strcat(runDirPath "/" celltop ".cdl")

for above am getting error as max argument can be called 5 ...............in this how can i call arguments as it may keep changing as per user