Inconsistent acceptable syntax
AllCols = dt << Get Column Names();
AllColNames = dt << Get Column Names(string);
for(i=3, i<=n items(AllCols), i++,
colcol = AllCols[i];
cname = AllColNames[i];
nnm1 = Col Number(colcol);
Fstr = "num(:\!""||cname||"\!"n)";
Fexpr = parse(Fstr);
newcol = dt << new column("Temp", numeric, formula(eval(evalexpr(Fexpr))));
nnm2 = Col Number(newcol);
if(nnm2 == nnm1,
newcol << delete formul
...