how to write the formula in excel vba with use of special symbols

Question

Twsht.Cells(Trow + 1, 15).Formula = "=IFERROR(VLOOKUP(M" & Trow + 1 & Chr(38) & "-" & Chr(38) & "N" & Trow + 1 & ",'Table Array'!$A$2:$D$26,4,FALSE)," & Chr(34) & Chr(34) & ")"

Getting below error message "Run-Time error 1004" Application-defined or object-defined error

if i paste below formula directly in cell it working

=IFERROR(VLOOKUP(M604&-N604,'Table Array'!$A$2:$D$26,4,FALSE),"")

Answer 1

use:

Twsht.Cells(Trow + 1, 15).Formula = "=IFERROR(VLOOKUP(M" & Trow + 1 & "&-N" & Trow + 1 & ",'Table Array'!$A$2:$D$26,4,FALSE),"""")"