when the line lenght is greater of 374 characters, sb_thumbtrack/sb_thumbposition does not advance but, only it is possible to be advanced with sb_lineright.
suggestion, if you do not want to calculate the thumbtrack's width in function of the largest's line (processing all the file), beam that limits is greater, for example 512 or 1024.
sorry for my english
There is a new upload of RadASM 2.2.1.1 that fixes this.
KetilO
ok, thx :U