Qstring bad index.

[peppermg]

Ah true, I probably should have read that a little closer.

[d_stranz]

And I realize that in combination with your indexOf() code, you could do it in about 2 or 3 lines.

[gbtrl.]

My bad. Replace the 'd' in "HelloWorld" with 'e'.

[d_stranz]

Replace the 'd' in "HelloWorld" with 'e'.

Well, that won't happen either with your example, because 'e' comes before 'd' in your vowels string.

[gbtrl.]

Just put one of vowels characters at the end of newtext and test it.

[d_stranz]

The code I posted earlier does exactly that. It replaces 'd' with 'o', the next character in the vowels string after 'd'.

Obviously the code you posted in your first post is not your real code, otherwise it would do the same.